@inproceedings{GschreySeifriedKruegeretal., author = {Gschrey, Manuel and Seifried, Marc and Kr{\"u}ger, Luzy and Schmidt, Ronny and Schulze, Jan-Hindrick and Heindel, Tobias and Burger, Sven and Rodt, Sven and Schmidt, Frank and Strittmatter, Andre and Reitzenstein, Stephan}, title = {Boosting the photon-extraction efficiency of nanophotonic structures by deterministic microlenses}, series = {CLEO: 2014}, booktitle = {CLEO: 2014}, publisher = {Optical Society of America}, doi = {10.1364/CLEO_QELS.2014.FF2K.2}, pages = {FF2K.2}, language = {en} } @misc{AmiranashviliBandelowBlomeetal., author = {Amiranashvili, Shalva and Bandelow, Uwe and Blome, Mark and Burger, Sven and Schmidt, Frank and Schmidt, Kersten and Zschiedrich, Lin}, title = {Nanophotonics and nonlinear fiber optics}, series = {MATHEON-Mathematics for Key Technologies}, volume = {1}, journal = {MATHEON-Mathematics for Key Technologies}, editor = {Deuflhard, Peter and et al.,}, publisher = {European Mathematical Society}, doi = {10.4171/137}, pages = {257 -- 275}, language = {en} } @inproceedings{ThomaSchnauberGschreyetal., author = {Thoma, Alexander and Schnauber, Peter and Gschrey, Manuel and Schmidt, Ronny and Wohlfeil, Benjamin and Seifried, Marc and Schulze, Jan-Hindrick and Burger, Sven and Schmidt, Frank and Strittmatter, Andre and Rodt, Sven and Heindel, Tobias and Reitzenstein, Stephan}, title = {Indistinguishable Photons from Deterministic Quantum Dot Microlenses}, series = {European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference}, booktitle = {European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference}, doi = {10.1364/IPRSN.2015.IS4A.6}, pages = {EA_8_5}, language = {en} } @inproceedings{GschreySeifriedKruegeretal., author = {Gschrey, Manuel and Seifried, Marc and Kr{\"u}ger, Luzy and Schmidt, Ronny and Schulze, Jan-Hindrick and Heindel, Tobias and Burger, Sven and Rodt, Sven and Schmidt, Frank and Strittmatter, Andre and Reitzenstein, Stephan}, title = {Advanced Quantum Light Sources: Modelling and Realization by Deterministic Nanofabrication Technologies}, series = {Integrated Photonics Research, Silicon and Nanophotonics}, volume = {IPRSN}, booktitle = {Integrated Photonics Research, Silicon and Nanophotonics}, doi = {10.1364/IPRSN.2014.IW1A.3}, pages = {IW1A.3}, language = {en} } @article{GschreyThomaSchnauberetal., author = {Gschrey, Manuel and Thoma, Alexander and Schnauber, Peter and Seifried, Marc and Schmidt, Ronny and Wohlfeil, Benjamin and Kr{\"u}ger, Luzy and Schulze, Jan-Hindrick and Heindel, Tobias and Burger, Sven and Schmidt, Frank and Strittmatter, Andre and Rodt, Sven and Reitzenstein, Stephan}, title = {Highly indistinguishable photons from deterministic quantum-dot microlenses utilizing three-dimensional in situ electron-beam lithography}, series = {Nature Communications}, volume = {6}, journal = {Nature Communications}, doi = {10.1038/ncomms8662}, pages = {7662}, language = {en} } @inproceedings{ThomaSchnauberGschreyetal., author = {Thoma, Alexander and Schnauber, Peter and Gschrey, Manuel and Schmidt, Ronny and Wohlfeil, Benjamin and Seifried, Marc and Schulze, Jan-Hindrick and Burger, Sven and Schmidt, Frank and Strittmatter, Andre and Rodt, Sven and Heindel, Tobias and Reitzenstein, Stephan}, title = {Indistinguishable Photons from Deterministically Fabricated Quantum Dot Microlenses}, series = {Advanced Photonics}, booktitle = {Advanced Photonics}, doi = {10.1364/IPRSN.2015.IS4A.6}, pages = {IS4A.6}, language = {en} } @inproceedings{ScholzeLaubisDerschetal.2007, author = {Scholze, Frank and Laubis, Christian and Dersch, Uwe and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {The influence of line edge roughness and CD uniformity on EUV scatterometry for CD characterization of EUV masks}, series = {Modeling Aspects in Optical Metrology}, volume = {6617}, booktitle = {Modeling Aspects in Optical Metrology}, editor = {Bosse, Harald}, publisher = {Proc. SPIE}, pages = {66171A}, year = {2007}, language = {en} } @inproceedings{ScholzeLaubisUlmetal.2008, author = {Scholze, Frank and Laubis, Christian and Ulm, Gerhard and Dersch, Uwe and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {Evaluation of EUV scatterometry for CD characterization of EUV masks using rigorous FEM-simulation}, series = {Emerging Lithographic Technologies XII}, volume = {6921}, booktitle = {Emerging Lithographic Technologies XII}, editor = {Schellenberg, Frank}, publisher = {SPIE}, year = {2008}, language = {en} } @inproceedings{PomplunBurgerSchmidtetal.2008, author = {Pomplun, Jan and Burger, Sven and Schmidt, Frank and Scholze, Frank and Laubis, Christian and Dersch, Uwe}, title = {Metrology of EUV masks by EUV-scatterometry and finite element analysis}, series = {Photomask and Next-Generation Lithography Mask Technology XV}, volume = {7028}, booktitle = {Photomask and Next-Generation Lithography Mask Technology XV}, editor = {Horiuchi, Toshiyuki}, publisher = {SPIE}, year = {2008}, language = {en} } @inproceedings{PomplunBurgerSchmidtetal.2006, author = {Pomplun, Jan and Burger, Sven and Schmidt, Frank and Zschiedrich, Lin and Scholze, Frank}, title = {Rigorous FEM-Simulation of EUV-Masks: Influence of shape and material parameters}, series = {Photomask Technology}, volume = {6349}, booktitle = {Photomask Technology}, editor = {Martin, P. and Naber, R.}, publisher = {Proc. SPIE}, doi = {10.1117/12.686828}, pages = {63493D}, year = {2006}, language = {en} } @inproceedings{PomplunBurgerSchmidtetal.2007, author = {Pomplun, Jan and Burger, Sven and Schmidt, Frank and Scholze, Frank and Laubis, Christian and Dersch, Uwe}, title = {Finite element analysis of EUV lithography}, series = {Modeling Aspects in Optical Metrology}, volume = {6617}, booktitle = {Modeling Aspects in Optical Metrology}, editor = {Bosse, Harald}, publisher = {Proc. SPIE}, doi = {10.1117/12.726156}, pages = {661718}, year = {2007}, language = {en} } @inproceedings{BurgerZschiedrichPomplunetal.2011, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Schmidt, Frank and Kato, Akiko and Laubis, Christian and Scholze, Frank}, title = {Investigation of 3D Patterns on EUV Masks by Means of Scatterometry and Comparison to Numerical Simulations}, series = {Photomask Technology 2011}, volume = {8166}, booktitle = {Photomask Technology 2011}, publisher = {Proc. SPIE}, doi = {10.1117/12.896839}, pages = {81661Q}, year = {2011}, language = {en} } @misc{YevickFrieseSchmidt, author = {Yevick, David and Friese, Tilmann and Schmidt, Frank}, title = {A Comparison of Transparent Boundary Conditions for the Fresnel Equation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-5738}, number = {00-05}, abstract = {We establish the relationship between the transparent boundary condition (BPP) of Baskakov and Popov [Wave Motion 14 (1991) 121-128] and Pakpadakis et. al. [J. Acoust. Soc. Am. 92 (1992) 2030-2038] and a second boundary condition (SDY) introduced by Schmidt and Deuflhard [Comp. Math. Appl. 29 (1995) 53-76] and Schmidt and Yevick [J. Compu. Phys. 134 (1997) 96-107], that is explicitly tailored to the form of the underlying numerical propagation scheme. Our analysis demonstrates that if the domain is first discretized in the propagation direction, the SDY expression can be obtained by applying the exact sequence of steps used to derive the BPP procedure. The BPP method is thus an approximate realization of the computationally far simpler and unconditionally stable SDY boundary condition.}, language = {en} } @misc{Schmidt, author = {Schmidt, Frank}, title = {Discrete Nonreflecting Boundary Conditions for the Helmholtz Equation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-5744}, number = {00-06}, abstract = {We derive exact discrete nonreflecting boundary conditions for time-harmonic scattering problems modeled by the Helmholtz equation. The main idea is to consider the exterior problem as an initial value problem with initial data given on the boundary of the computational domain. The solution of the exterior problem is obtained via Laplace transformation techniques which supply the boundary conditions in terms of discrete Dirichlet-to-Neumann operators.}, language = {en} } @misc{HohageSchmidt, author = {Hohage, Thorsten and Schmidt, Frank}, title = {On the Numerical Solution of Nonlinear Schr{\"o}dinger type equations in fiber optics}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-6715}, number = {02-04}, abstract = {The aim of this paper is to develop fast methods for the solution of nonlinear Schr{\"o}dinger type equations in fiber optics. Using the method of lines we have to solve a stiff system of ordinary differential equations where the eigenvalues of the Jacobian are close to the imaginary axis. This is usually done by a Split Step method. Here we consider the extrapolation of Split Step methods with adaptive order and step size control. For more complicated nonlinearities, in particular stimulated Raman scattering, Split Step methods are less efficient since symmetry is either destroyed or requires much additional effort. In this case we use implicit Runge Kutta formulas of Gauß type. The key point for the efficient implementation of these methods is that the system of nonlinear algebraic equations can be solved without setting up the Jacobian. The proposed methods are compared to other methods, in particular exponential integrators, the method of Marcuse, and the method of Blow and Wood.}, language = {en} } @misc{CordesWeberSchmidtEhrenberg, author = {Cordes, Frank and Weber, Marcus and Schmidt-Ehrenberg, Johannes}, title = {Metastable Conformations via successive Perron-Cluster Cluster Analysis of dihedrals}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-7074}, number = {02-40}, abstract = {Decomposition of the high dimensional conformational space of bio-molecules into metastable subsets is used for data reduction of long molecular trajectories in order to facilitate chemical analysis and to improve convergence of simulations within these subsets. The metastability is identified by the Perron-cluster cluster analysis of a Markov process that generates the thermodynamic distribution. A necessary prerequisite of this analysis is the discretization of the conformational space. A combinatorial approach via discretization of each degree of freedom will end in the so called ''curse of dimension''. In the following paper we analyze Hybrid Monte Carlo simulations of small, drug-like biomolecules and focus on the dihedral degrees of freedom as indicators of conformational changes. To avoid the ''curse of dimension'', the projection of the underlying Markov operator on each dihedral is analyzed according to its metastability. In each decomposition step of a recursive procedure, those significant dihedrals, which indicate high metastability, are used for further decomposition. The procedure is introduced as part of a hierarchical protocol of simulations at different temperatures. The convergence of simulations within metastable subsets is used as an ''a posteriori'' criterion for a successful identification of metastability. All results are presented with the visualization program AmiraMol.}, language = {en} } @misc{HohageSchmidtZschiedrich, author = {Hohage, Thorsten and Schmidt, Frank and Zschiedrich, Lin}, title = {Solving time-harmonic scattering problems based on the pole condition: Convergence of the PML method}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-6494}, number = {01-23}, abstract = {In this paper we study the PML method for Helmholtz-type scattering problems with radially symmetric potential. The PML method consists in surrounding the computational domain by a \textbf{P}erfectly \textbf{M}atched sponge \textbf{L}ayer. We prove that the approximate solution obtained by the PML method converges exponentially fast to the true solution in the computational domain as the thickness of the sponge layer tends to infinity. This is a generalization of results by Lassas and Somersalo based on boundary integral eqaution techniques. Here we use techniques based on the pole condition instead. This makes it possible to treat problems without an explicitly known fundamental solution.}, language = {en} } @misc{HohageSchmidtZschiedrich, author = {Hohage, Thorsten and Schmidt, Frank and Zschiedrich, Lin}, title = {A new method for the solution of scattering problems}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-6683}, number = {02-01}, abstract = {We present a new efficient algorithm for the solution of direct time-harmonic scattering problems based on the Laplace transform. This method does not rely on an explicit knowledge of a Green function or a series representation of the solution, and it can be used for the solution of problems with radially symmetric potentials and problems with waveguides. The starting point is an alternative characterization of outgoing waves called \emph{pole condition}, which is equivalent to Sommerfeld's radiation condition for problems with radially symmetric potentials. We obtain a new representation formula, which can be used for a numerical evaluation of the exterior field in a postprocessing step. Based on previous theoretical studies, we discuss the numerical realization of our algorithm and compare its performance to the PML method.}, language = {en} } @phdthesis{Schmidt, author = {Schmidt, Frank}, title = {A New Approach to Coupled Interior-Exterior Helmholtz-Type Problems: Theory and Algorithms}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-7128}, number = {02-45}, abstract = {The work presents a new approach to the numerical solution of time-harmonic and time-dependent scattering problems. We replace Sommerfeld's radiation condition valid for the Helmholtz equation by a more general concept called pole condition. The pole condition is based on the Laplace transform of the exterior solution and allows a characterization of outgoing waves. Both new insight into the analysis of scattering problems as well as new numerical algorithms are obtained.}, language = {en} } @misc{ZschiedrichKloseSchaedleetal., author = {Zschiedrich, Lin and Klose, Roland and Sch{\"a}dle, Achim and Schmidt, Frank}, title = {A new Finite Element realization of the Perfectly Matched Layer Method for Helmholtz scattering problems on polygonal domains in 2D}, doi = {10.1016/j.cam.2005.03.047}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-7662}, number = {03-44}, abstract = {In this paper we propose a new finite element realization of the Perfectly Matched Layer method (PML-method). Our approach allows to deal with arbitrary shaped polygonal domains and with certain types of inhomogeneous exterior domains. Among the covered inhomogeneities are open waveguide structures playing an essential role in integrated optics. We give a detailed insight to implementation aspects. Numerical examples show exponential convergence behavior to the exact solution with the thickness of the PML sponge layer.}, language = {en} } @misc{MayEisenhardtSchmidtEhrenbergetal., author = {May, Andreas and Eisenhardt, Steffen and Schmidt-Ehrenberg, Johannes and Cordes, Frank}, title = {Rigid body docking for Virtual Screening}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-7690}, number = {03-47}, abstract = {A recently developed algorithm allows Rigid Body Docking of ligands to proteins, regardless of the accessibility and location of the binding site. The Docking procedure is divided into three subsequent optimization phases, two of which utilize rigid body dynamics. The last one is applied with the ligand already positioned inside the binding pocket and accounts for full flexibility. Initially, a combination of geometrical and force-field based methods is used as a Coarse Docking strategy, considering only Lennard-Jones interactions between the target and pharmaceutically relevant atoms or functional groups. The protein is subjected to a Hot Spot Analysis, which reveals points of high affinity in the protein environment towards these groups. The hot spots are distributed into different subsets according to their group affiliation. The ligand is described as a complementary point set, consisting of the same subsets. Both sets are matched in \$\mathrm{I\!R}^{3}\$, by superimposing members of the same subsets. In the first instance, steric inhibition is nearly neglected, preventing the system's trajectory from trapping in local minima and thus from finding false positive solutions. Hence the exact location of the binding site can be determined fast and reliably without any additional information. Subsequently, errors resulting from approximations are minimized via finetuning, this time considering both Lennard-Jones and Coulomb forces. Finally, the potential energy of the whole complex is minimized. In a first evaluation, results are rated by a reduced scoring function considering only noncovalent interaction energies. Exemplary Screening results will be given for specific ligands.}, language = {en} } @misc{RuprechtSchaedleSchmidtetal., author = {Ruprecht, Daniel and Sch{\"a}dle, Achim and Schmidt, Frank and Zschiedrich, Lin}, title = {Transparent boundary conditons for time-dependent problems}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-9558}, number = {07-12}, abstract = {A new approach to derive transparent boundary conditions (TBCs) for wave, Schr{\"o}dinger, heat and drift-diffusion equations is presented. It relies on the pole condition and distinguishes between physical reasonable and unreasonable solutions by the location of the singularities of the spatial Laplace transform of the exterior solution. To obtain a numerical algorithm, a M{\"o}bius transform is applied to map the Laplace transform onto the unit disc. In the transformed coordinate the solution is expanded into a power series. Finally, equations for the coefficients of the power series are derived. These are coupled to the equation in the interior, and yield transparent boundary conditions. Numerical results are presented in the last section, showing that the error introduced by the new approximate TBCs decays exponentially in the number of coefficients.}, language = {en} } @misc{SchaedleZschiedrichBurgeretal., author = {Sch{\"a}dle, Achim and Zschiedrich, Lin and Burger, Sven and Klose, Roland and Schmidt, Frank}, title = {Domain Decomposition Method for Maxwell's Equations: Scattering off Periodic Structures}, doi = {/10.1016/j.jcp.2007.04.017}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-8984}, number = {06-04}, abstract = {We present a domain decomposition approach for the computation of the electromagnetic field within periodic structures. We use a Schwarz method with transparent boundary conditions at the interfaces of the domains. Transparent boundary conditions are approximated by the perfectly matched layer method (PML). To cope with Wood anomalies appearing in periodic structures an adaptive strategy to determine optimal PML parameters is developed. We focus on the application to typical EUV lithography line masks. Light propagation within the multi-layer stack of the EUV mask is treated analytically. This results in a drastic reduction of the computational costs and allows for the simulation of next generation lithography masks on a standard personal computer.}, language = {en} } @misc{DeuflhardFrieseSchmidtetal., author = {Deuflhard, Peter and Friese, Tilmann and Schmidt, Frank and M{\"a}rz, Reinhard and Nolting, Hans-Peter}, title = {Effiziente Eigenmodenberechnung f{\"u}r den Entwurf integriert-optischer Chips}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-2131}, number = {SC-96-02}, abstract = {{\bf Efficient eigenmode computation for the design of integrated optical chips.}The paper deals with adaptive multigrid methods for 2D Helmholtz eigenvalue problems arising in the design of integrated optical chips. Typical features of the technological problem are its geometric complexity, its multiscale structure, the possible occurrence of eigenvalue clusters, and the necessity of quite stringent required relative error tolerances. For reasons of sheer computational complexity, multigrid methods must be used to solve the discretized eigenvalue problems and adaptive grids must be automatically constructed to avoid an undesirable blow-up of the required number of nodes for these accuracies. In view of the problem specifications, an adaptive multigrid method based on Rayleigh quotient minimization, simultaneous eigenspace iteration, and conjugate gradient method as smoother is carefully selected. Its performance in the numerical simulation of a component of a rather recent optical chip (heterodyne receiver of HHI) is documented.}, language = {de} } @misc{Schmidt, author = {Schmidt, Frank}, title = {Simultaneous Computation of the Lowest Eigenvalue and Eigenvectors of the Helmholtz Equation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-5281}, number = {TR-95-13}, abstract = {This report collects a number of proposals to determine the lowest eigensolutions of the scalar Helmholtz equation. The basic routine of all discussed algorithms is the standard Rayleigh quotient minimization process. The minimization is performed in a direct multilevel manner, and a subspace iteration is used to determine simultaneously a couple of eigensolutions. As smoother the nonlinear Gauß-Seidel, the nonlinear conjugate gradient method and a preconditioned version of this method are compared with respect to their efficiency. The numerical examples are based on realistic 1D and 2D models of integrated optics components.}, language = {en} } @misc{FrieseSchmidtYevick, author = {Friese, Tilman and Schmidt, Frank and Yevick, David}, title = {Transparent Boundary Conditions for a Wide-Angle Approximation of the One-Way Helmholtz Equation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-4345}, number = {SC-99-45}, abstract = {We present nonlocal discrete transparent boundary conditions for a fourth-order wide-angle approximation of the two-dimensional Helmholtz equation. The boundary conditions are exact in the sense that they supply the same discrete solution on a bounded interior domain as would be obtained by considering the problem on the entire unbounded domain with zero boundary conditions at infinity. The proposed algorithm results in an unconditionally stable propagation method. Numerical examples from optics illustrate the efficiency of our approach.}, language = {en} } @misc{SchmidtFrieseYevick, author = {Schmidt, Frank and Friese, Tilmann and Yevick, David}, title = {Transparent Boundary Conditions for Split-Step Pade Approximations of the One-Way Helmholtz Equation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-4353}, number = {SC-99-46}, abstract = {In this paper, we generalize the nonlocal discrete transparent boundary condition introduced by Schmidt and Deuflhard {[}Comp. Math. Appl. 29 (1995) 53-76{]} and Schmidt and Yevick {[}J. Comput. Phys. 134 (1997) 96-107{]} to propagation methods based on arbitrary Pad\'e approximations to the two-dimensional one-way Helmholtz equation. Our approach leads to a recursive formula for the coefficients appearing in the nonlocal condition which then yields an unconditionally stable propagation method.}, language = {en} } @misc{Schmidt, author = {Schmidt, Frank}, title = {An Alternative Derivation of the Exact DtN-Map on a Circle}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-3752}, number = {SC-98-32}, abstract = {The paper supplies an alternative derivation of the exact boundary conditions needed for the solution of time-harmonic acoustic scattering problems modeled by the Helmholtz equation. The main idea is to consider the exterior domain problem as an initial value problem with initial data given on the boundary of a disc or sphere. The solution of the exterior domain problem is obtained via Laplace transformation techniques, where the asymptotic Sommerfeld radiation condition is reformulated accordingly.}, language = {en} } @misc{Schmidt, author = {Schmidt, Frank}, title = {An Adaptive Approach to the Numerical Solution of Fresnel's Wave Equation.}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-628}, number = {SC-91-12}, abstract = {An adaptive approach to the numerical solution of the wave propagation in integrated optics devices with 1D cross sections is described. First, Fresnel's approximation of the exact wave equation resulting from Maxwell's equations is considered. A criterion to estimate the validity of this approximation is derived. Fresnel's wave equation being formally equivalent to Schroedinger's equation uniquely defines an initial-boundary-value problem, which is solved numerically by a stepwise calculation of the propagating field. Discretization in longitudinal direction first with stepsize control leads to a stationary subproblem for the transversal field distribution, which is then handled by an adaptive finite element method. Thus full adaptivity of the algorithm is realized. The numerical examples are concentrated on taper structures playing an essential role in integrated optics devices for telecommunication systems.}, language = {en} } @misc{SchmidtMaerz, author = {Schmidt, Frank and M{\"a}rz, Reinhard}, title = {On the Reference Wave Vector pf Paraxial Helmholtz Equations}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-1660}, number = {SC-94-38}, abstract = {The reference wave vector of the paraxial Helmholtz equation is determined using various strategies which result all in similar expressions. The effort for its evaluation is so small that the reference wave vector can be adapted for each propagation step of an arbitrary BPM-algorithm.}, language = {en} } @misc{DeuflhardSchmidt, author = {Deuflhard, Peter and Schmidt, Frank}, title = {Discrete Transparent Boundary Conditions for the Numerical Solution of Fresnel's Equation.}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-1205}, number = {SC-93-24}, abstract = {The paper presents a construction scheme of deriving transparent , i. e. reflection-free, boundary conditions for the numerical solution of Fresnel's equation (being formally equivalent to Schr{\"o}dinger's equation). These boundary conditions appear to be of a nonlocal Cauchy type. As it turns out, each kind of linear implicit discretization induces its own discrete transparent boundary conditions.}, language = {en} } @misc{Schmidt, author = {Schmidt, Frank}, title = {Computation of Discrete Transparent Boundary Conditions for the 2D Helmholtz Equation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-3330}, number = {SC-97-64}, abstract = {We present a family of nonlocal transparent boundary conditions for the 2D Helmholtz equation. The whole domain, on which the Helmholtz equation is defined, is decomposed into an interior and an exterior domain. The corresponding interior Helmholtz problem is formulated as a variational problem in standard manner, representing a boundary value problem, whereas the exterior problem is posed as an initial value problem in the radial variable. This problem is then solved approximately by means of the Laplace transformation. The derived boundary conditions are asymptotically correct, model inhomogeneous exterior domains and are simple to implement.}, language = {en} } @misc{SchmidtYevick, author = {Schmidt, Frank and Yevick, David}, title = {Discrete Transparent Boundary Conditions for Schr{\"o}dinger-Type Equations}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-2289}, number = {SC-96-17}, abstract = {We present a general technique for constructing nonlocal transparent boundary conditions for one-dimensional Schr{\"o}dinger-type equations. Our method supplies boundary conditions for the \$\theta\$-family of implicit one-step discretizations of Schr{\"o}dinger's equation in time. The use of Mikusi\'nski's operator approach in time avoids direct and inverse transforms between time and frequency domains and thus implements the boundary conditions in a direct manner.}, language = {en} } @misc{DeuflhardFrieseSchmidt, author = {Deuflhard, Peter and Friese, Tilmann and Schmidt, Frank}, title = {A Nonlinear Multigrid Eigenproblem Solver for the Complex Helmholtz Equation}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-3240}, number = {SC-97-55}, abstract = {The paper is motivated by the need for a fast robust adaptive multigrid method to solve complex Helmholtz eigenvalue problems arising from the design of optical chips. A nonlinear multigrid method is developed, which can be regarded as an extension of a previous adaptive Rayleigh quotient minimization method for selfadjoint Helmholtz eigenproblems. Since the complex Helmholtz operator is just a compact nonselfadjoint perturbation of a selfadjoint operator, linear algebra techniques like Schur decomposition can be extended from the finite dimensional case. The efficiency of the derived adaptive nonlinear multigrid method is illustrated by computations for a technologically relevant integrated optics component containing Multi Quantum Well Layers.}, language = {en} } @misc{Schmidt, author = {Schmidt, Frank}, title = {Construction of Discrete Transparent Boundary Conditions for Schr{\"o}dinger-Type Equations}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-3292}, number = {SC-97-60}, abstract = {We present a general technique for constructing nonlocal transparent boundary conditions for time-discretized one-dimensional Schr{\"o}dinger type equations. The main tool of construction is the discrete counterpart to Mikusi\'nski's continuous algebraic operator approach. Existing techniques are simplified and generalized. Both adaptive time-steps and time-dependent exterior potentials are taken into account.}, language = {en} } @misc{SchmidtFrieseZschiedrichetal., author = {Schmidt, Frank and Friese, Tilmann and Zschiedrich, Lin and Deuflhard, Peter}, title = {Adaptive Multigrid Methods for the Vectorial Maxwell Eigenvalue Problem for Optical Waveguide Design}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-6228}, number = {00-54}, abstract = {This paper has been motivated by the need for a fast robust adaptive multigrid method to solve the vectorial Maxwell eigenvalue problem arising from the design of optical chips. Our nonlinear multigrid methods are based on a previous method for the scalar Helmholtz equation, which must be modified to cope with the null space of the Maxwell operator due to the divergence condition. We present two different approaches. First, we present a multigrid algorithm based on an edge element discretization of time-harmonic Maxwell's equations, including the divergence condition. Second, an explicit elimination of longitudinal magnetic components leads to a nodal discretization known to avoid discrete \emph{spurious modes} also and a vectorial eigenvalue problem, for which we present a multigrid solver. Numerical examples show that the edge element discretization clearly outperforms the nodal element approach.}, language = {en} } @misc{HohageSchmidtZschiedrich, author = {Hohage, Thorsten and Schmidt, Frank and Zschiedrich, Lin}, title = {Solving time-harmonic scattering problems based on the condition: Theory}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-6279}, number = {01-01}, abstract = {The pole condition is a general concept for the theoretical analysis and the numerical solution of a variety of wave propagation problems. It says that the Laplace transform of the physical solution in radial direction has no poles in the lower complex half-plane. In the present paper we show that for the Helmholtz equation with a radially symmetric potential the pole condition is equivalent to Sommerfeld's radiation condition. Moreover, a new representation formula based on the pole condition is derived and used to prove existence, uniqueness and asymptotic properties of solutions. This lays the foundations of a promising new algorithm to solve time-harmonic scattering problems numerically and provides a new approach for analyzing existing algorithms such as the Perfectly Matched Layer (PML) method and the Bayliss-Gunzburger-Turkel (BGT) algorithm.}, language = {en} } @article{BlomeMcPeakBurgeretal.2014, author = {Blome, Mark and McPeak, Kevin and Burger, Sven and Schmidt, Frank and Norris, David}, title = {Back-reflector design in thin-film silicon solar cells by rigorous 3D light propagation modeling}, series = {COMPEL: Int. J. Comput. Mathem. Electr. Electron. Eng.}, volume = {33}, journal = {COMPEL: Int. J. Comput. Mathem. Electr. Electron. Eng.}, number = {4}, doi = {10.1108/COMPEL-12-2012-0367}, pages = {1282 -- 1295}, year = {2014}, language = {en} } @incollection{BurgerKloseSchaedleetal.2006, author = {Burger, Sven and Klose, Roland and Sch{\"a}dle, Achim and Schmidt, Frank and Zschiedrich, Lin}, title = {Adaptive FEM solver for the computation of electromagnetic eigenmodes in 3D photonic crystal structures}, series = {Scientific Computing in Electrical Engineering}, booktitle = {Scientific Computing in Electrical Engineering}, publisher = {Springer Verlag}, doi = {10.1007/978-3-540-32862-9_24}, pages = {169 -- 175}, year = {2006}, language = {en} } @inproceedings{BurgerKleemannZschiedrichetal.2009, author = {Burger, Sven and Kleemann, B. and Zschiedrich, Lin and Schmidt, Frank}, title = {Finite-Element Simulations of Light Propagation through Circular Subwavelength Apertures}, series = {Microtechnologies for the New Millenium}, volume = {7366}, booktitle = {Microtechnologies for the New Millenium}, publisher = {Proc. SPIE}, doi = {10.1117/12.822828}, pages = {736621}, year = {2009}, language = {en} } @inproceedings{BurgerKoehleZschiedrichetal.2006, author = {Burger, Sven and K{\"o}hle, Roderick and Zschiedrich, Lin and Nguyen, H. and Schmidt, Frank and M{\"a}rz, Reinhard and N{\"o}lscher, Christoph}, title = {Rigorous Simulation of 3D Masks}, series = {Photomask Technology}, volume = {6349}, booktitle = {Photomask Technology}, editor = {Martin, P. and Naber, R.}, publisher = {Proc. SPIE}, pages = {63494Z}, year = {2006}, language = {en} } @inproceedings{BurgerKoehleZschiedrichetal.2005, author = {Burger, Sven and K{\"o}hle, Roderick and Zschiedrich, Lin and Gao, W. and Schmidt, Frank and M{\"a}rz, Reinhard and N{\"o}lscher, Christoph}, title = {Benchmark of FEM, Waveguide and FDTD Algorithms for Rigorous Mask Simulation}, series = {Photomask Technology}, volume = {5992}, booktitle = {Photomask Technology}, editor = {Weed, J. and Martin, P.}, publisher = {Proc. SPIE}, doi = {10.1117/12.631696}, pages = {378 -- 389}, year = {2005}, language = {en} } @inproceedings{BurgerLockauZschiedrichetal.2009, author = {Burger, Sven and Lockau, D. and Zschiedrich, Lin and Schmidt, Frank}, title = {Finite-element simulations of light propagation through subwavelength apertures in metal films}, series = {International Workshop on Optical Waveguide Theory and Numerical Modelling}, volume = {XVIII}, booktitle = {International Workshop on Optical Waveguide Theory and Numerical Modelling}, publisher = {Fraunhofer Institute for Applied Optics and Precision Engineering}, pages = {59}, year = {2009}, language = {en} } @incollection{BurgerPomplunSchmidt2012, author = {Burger, Sven and Pomplun, Jan and Schmidt, Frank}, title = {Finite Element Methods for Computational Nano-optics}, series = {Encyclopedia of Nanotechnology}, booktitle = {Encyclopedia of Nanotechnology}, editor = {Bhushan, B.}, publisher = {Springer Netherlands}, doi = {10.1007/978-90-481-9751-4_17}, pages = {837 -- 843}, year = {2012}, language = {en} } @inproceedings{BurgerSchmidtZschiedrich2003, author = {Burger, Sven and Schmidt, Frank and Zschiedrich, Lin}, title = {A fast and efficient Finite-Element Solver for 2D and 3D Photonic Band-Gap Problems}, series = {Dig. LEOS/IEEE 2003 Summer Topicals}, booktitle = {Dig. LEOS/IEEE 2003 Summer Topicals}, doi = {10.1109/LEOSST.2003.1224282}, pages = {75}, year = {2003}, language = {en} } @inproceedings{BurgerZschiedrichSchmidt2010, author = {Burger, Sven and Zschiedrich, Lin and Schmidt, Frank}, title = {3D FEM Simulations of High-Q Resonances in Photonic Crystal Microcavities}, series = {Integrated Photonics Research, Silicon and Nanophotonics}, booktitle = {Integrated Photonics Research, Silicon and Nanophotonics}, publisher = {OSA}, doi = {10.1364/IPRSN.2010.IWB7}, pages = {IWB7}, year = {2010}, language = {en} } @inproceedings{BurgerSchmidtZschiedrich2010, author = {Burger, Sven and Schmidt, Frank and Zschiedrich, Lin}, title = {FEM simulation of resonances in low-Q cavities for plasmon lasers}, series = {International Workshop on Photonic Nanomaterials}, booktitle = {International Workshop on Photonic Nanomaterials}, editor = {Jena, Friedrich-Schiller-Universit{\"a}t}, isbn = {978-3-00-031358-5}, pages = {36}, year = {2010}, language = {en} } @inproceedings{BurgerSchmidtZschiedrich2010, author = {Burger, Sven and Schmidt, Frank and Zschiedrich, Lin}, title = {Numerical investigation of optical resonances in circular grating resonators}, series = {Silicon Photonics V}, volume = {7606}, booktitle = {Silicon Photonics V}, publisher = {Proc. SPIE}, doi = {10.1117/12.842061}, pages = {760610}, year = {2010}, language = {en} } @inproceedings{BurgerSchmidtZschiedrich2010, author = {Burger, Sven and Schmidt, Frank and Zschiedrich, Lin}, title = {Numerical Investigation of Photonic Crystal Microcavities in Silicon-on-Insulator Waveguides}, series = {Photonic and Phononic Crystal Materials and Devices X}, volume = {7609}, booktitle = {Photonic and Phononic Crystal Materials and Devices X}, publisher = {Proc. SPIE}, doi = {10.1117/12.841867}, pages = {76091Q}, year = {2010}, language = {en} } @inproceedings{PomplunZschiedrichBurgeretal.2010, author = {Pomplun, Jan and Zschiedrich, Lin and Burger, Sven and Schmidt, Frank and Tyminski, Jacek and Flagello, Donis and Toshiharu, N.}, title = {Reduced basis method for source mask optimization}, series = {Photomask Technology}, volume = {7823}, booktitle = {Photomask Technology}, publisher = {Proc. SPIE}, doi = {10.1117/12.866101}, pages = {78230E}, year = {2010}, language = {en} } @inproceedings{BurgerSchaedleZschiedrichetal.2006, author = {Burger, Sven and Sch{\"a}dle, Achim and Zschiedrich, Lin and Schmidt, Frank}, title = {Advanced FEM Analysis of Nano-Optical Devices}, series = {Nanophotonics}, volume = {6195}, booktitle = {Nanophotonics}, editor = {Andrews, David L. and Nunzi, Jean-Michel and Ostendorf, Andreas}, publisher = {Proc. SPIE}, doi = {10.1117/12.662942}, pages = {72 -- 82}, year = {2006}, language = {en} } @incollection{BurgerZschiedrichKettneretal.2008, author = {Burger, Sven and Zschiedrich, Lin and Kettner, Benjamin and Schmidt, Frank}, title = {FEM simulation of light scattering by nonspherical objects}, series = {Mie Theory 1908 - 2008}, booktitle = {Mie Theory 1908 - 2008}, editor = {Hergert, W. and Wriedt, T.}, publisher = {Universit{\"a}t Bremen}, pages = {82 -- 83}, year = {2008}, language = {en} } @inproceedings{BurgerZschiedrichKloseetal.2005, author = {Burger, Sven and Zschiedrich, Lin and Klose, Roland and Sch{\"a}dle, Achim and Schmidt, Frank and Enkrich, Christian and Linden, S. and Wegener, M. and Soukoulis, C.}, title = {Numerical Investigation of Light Scattering off Split-Ring Resonators}, series = {Metamaterials}, volume = {5955}, booktitle = {Metamaterials}, editor = {Szoplik, T. and {\"O}zbay, E. and Soukoulis, C. and Zheludev, N.}, publisher = {Proc. SPIE}, doi = {10.1117/12.622184}, pages = {18 -- 26}, year = {2005}, language = {en} } @inproceedings{BurgerZschiedrichPomplunetal.2009, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Schmidt, Frank and Kettner, Benjamin and Lockau, D.}, title = {3D Finite-Element Simulations of Enhanced Light Transmission Through Arrays of Holes in Metal Films}, series = {Numerical Methods in Optical Metrology}, volume = {7390}, booktitle = {Numerical Methods in Optical Metrology}, publisher = {Proc. SPIE}, doi = {10.1117/12.827543}, pages = {73900H}, year = {2009}, language = {en} } @inproceedings{BurgerZschiedrichPomplunetal.2010, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Schmidt, Frank}, title = {Finite element method for accurate 3D simulation of plasmonic waveguides}, series = {Integrated Optics: Devices, Materials, and Technologies XIV}, volume = {7604}, booktitle = {Integrated Optics: Devices, Materials, and Technologies XIV}, publisher = {Proc. SPIE}, doi = {10.1117/12.841995}, pages = {76040F}, year = {2010}, language = {en} } @inproceedings{BurgerZschiedrichPomplunetal.2008, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Schmidt, Frank}, title = {JCMsuite: An Adaptive FEM Solver for Precise Simulations in Nano-Optics}, series = {Integrated Photonics and Nanophotonics Research and Applications}, booktitle = {Integrated Photonics and Nanophotonics Research and Applications}, publisher = {Optical Society of America}, doi = {10.1364/IPNRA.2008.ITuE4}, pages = {ITuE4}, year = {2008}, language = {en} } @article{BurgerZschiedrichSchmidt2010, author = {Burger, Sven and Zschiedrich, Lin and Schmidt, Frank}, title = {FEM Simulation of Plasmon Laser Resonances}, series = {AIP Conference Proceedings}, volume = {1281}, journal = {AIP Conference Proceedings}, publisher = {AIP}, doi = {10.1063/1.3498131}, pages = {1613 -- 1616}, year = {2010}, language = {en} } @inproceedings{BurgerKloseMaerzetal.2004, author = {Burger, Sven and Klose, Roland and M{\"a}rz, Reinhard and Sch{\"a}dle, Achim and Schmidt, Frank and Zschiedrich, Lin}, title = {Efficient Finite Element Methods for the Design of Microoptical Components}, series = {Proc. Microoptics Conf. 2004}, booktitle = {Proc. Microoptics Conf. 2004}, year = {2004}, language = {en} } @inproceedings{BurgerKloseSchaedleetal.2005, author = {Burger, Sven and Klose, Roland and Sch{\"a}dle, Achim and Schmidt, Frank and Zschiedrich, Lin}, title = {FEM modelling of 3D photonic crystals and photonic crystal waveguides}, series = {Integrated Optics : Devices, Materials and Technologies IX}, volume = {5728}, booktitle = {Integrated Optics : Devices, Materials and Technologies IX}, editor = {Sidorin, Y. and W{\"a}chter, Christoph}, publisher = {Proc. SPIE}, doi = {10.1117/12.585895}, pages = {164 -- 173}, year = {2005}, language = {en} } @article{SchmidtFrieseYevick2001, author = {Schmidt, Frank and Friese, T. and Yevick, David}, title = {Transparent Boundary Conditions for Split-Step Pad{\´e} Approximations of the One-Way Helmholtz equation}, series = {J. Comp. Phys}, volume = {170}, journal = {J. Comp. Phys}, pages = {696 -- 719}, year = {2001}, language = {en} } @incollection{SchmidtFrieseZschiedrichetal.2003, author = {Schmidt, Frank and Friese, T. and Zschiedrich, Lin and Deuflhard, Peter}, title = {Adaptive Multigrid Methods for the Vectorial Maxwell Eigenvalue Problem for Optical Waveguide Design}, series = {Mathematics - Key Technology for the Future}, booktitle = {Mathematics - Key Technology for the Future}, publisher = {Springer}, pages = {270 -- 292}, year = {2003}, language = {en} } @article{SchmidtGottschling1992, author = {Schmidt, Frank and Gottschling, K.}, title = {Improved Method of Mode Determination in Planar Optical Waveguides Using Line Transmission Approach}, series = {J. Opt. Commun.}, volume = {12}, journal = {J. Opt. Commun.}, number = {3}, pages = {112 -- 114}, year = {1992}, language = {en} } @article{SchmidtHohageKloseetal.2008, author = {Schmidt, Frank and Hohage, Thorsten and Klose, Roland and Sch{\"a}dle, Achim and Zschiedrich, Lin}, title = {Pole condition: A numerical method for Helmholtz-type scattering problems with inhomogeneous exterior domain}, series = {J. Comput. Appl. Math.}, volume = {218}, journal = {J. Comput. Appl. Math.}, number = {1}, doi = {10.1016/j.cam.2007.04.046}, pages = {61 -- 69}, year = {2008}, language = {en} } @article{SchmidtMaerz1996, author = {Schmidt, Frank and M{\"a}rz, Reinhard}, title = {On the Reference Wave Vector of Paraxial Helmholtz Equations}, series = {IEEE Journal of Lightwave Technology}, volume = {14}, journal = {IEEE Journal of Lightwave Technology}, pages = {2395 -- 2400}, year = {1996}, language = {en} } @article{PomplunSchmidt2010, author = {Pomplun, Jan and Schmidt, Frank}, title = {Accelerated a posteriori error estimation for the reduced basis method with application to 3D electromagnetic scattering problems}, series = {SIAM J. Sci. Comput.}, volume = {32}, journal = {SIAM J. Sci. Comput.}, doi = {10.1137/090760271}, pages = {498 -- 520}, year = {2010}, language = {en} } @inproceedings{PomplunSchmidt2009, author = {Pomplun, Jan and Schmidt, Frank}, title = {Reduced basis method for fast and robust simulation of electromagnetic scattering problems}, series = {Numerical Methods in Optical Metrology}, volume = {7390}, booktitle = {Numerical Methods in Optical Metrology}, publisher = {Proc. SPIE}, doi = {10.1117/12.827588}, pages = {73900I}, year = {2009}, language = {en} } @inproceedings{PomplunZschiedrichBurgeretal.2009, author = {Pomplun, Jan and Zschiedrich, Lin and Burger, Sven and Schmidt, Frank}, title = {Reduced basis method for computational lithography}, series = {Photomask Technology}, volume = {7488}, booktitle = {Photomask Technology}, publisher = {Proc. SPIE}, doi = {10.1117/12.829639}, pages = {74882B}, year = {2009}, language = {en} } @inproceedings{PhilippowSchmidt1987, author = {Philippow, E. and Schmidt, Frank}, title = {Besondere L{\"o}sungen in harmonisch erregten Ferroresonanz-Kreisen}, series = {4. Internationales Symposium Theoretische Elektrotechnik Ilmenau}, volume = {2}, booktitle = {4. Internationales Symposium Theoretische Elektrotechnik Ilmenau}, pages = {26 -- 32}, year = {1987}, language = {en} } @inproceedings{SchmidtBurgerPomplunetal.2008, author = {Schmidt, Frank and Burger, Sven and Pomplun, Jan and Zschiedrich, Lin}, title = {Advanced FEM analysis of optical waveguides: algorithms and applications}, series = {Integrated Optics}, volume = {6896}, booktitle = {Integrated Optics}, editor = {Greiner, Christoph and W{\"a}chter, Christoph}, publisher = {SPIE}, doi = {10.1117/12.765720}, pages = {689602}, year = {2008}, language = {en} } @inproceedings{SchmidtBurgerSchaedleetal.2005, author = {Schmidt, Frank and Burger, Sven and Sch{\"a}dle, Achim and Klose, Roland}, title = {Finite element methods for optical device design}, series = {Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic devices}, booktitle = {Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic devices}, doi = {10.1109/NUSOD.2005.1518133}, pages = {57 -- 58}, year = {2005}, language = {en} } @inproceedings{SchmidtDeuflhard1994, author = {Schmidt, Frank and Deuflhard, Peter}, title = {Discrete Transparent Boundary Conditions for Fresnel's Equation}, series = {Integrated Photonics Research}, booktitle = {Integrated Photonics Research}, address = {San Francisco, California, USA}, pages = {45 -- 47}, year = {1994}, language = {en} } @article{SchmidtDeuflhard1995, author = {Schmidt, Frank and Deuflhard, Peter}, title = {Discrete Transparent Boundary Conditions for the Numerical Solution of Fresnel's Equation.}, series = {Comput. Math. Appl.}, volume = {29}, journal = {Comput. Math. Appl.}, pages = {53 -- 76}, year = {1995}, language = {en} } @inproceedings{Schmidt2000, author = {Schmidt, Frank}, title = {Discrete Nonreflecting Boundary Conditions for the Helmholtz equation}, series = {Fifth International Conference on Mathematical and Numerical Aspects of Wave Propagation}, booktitle = {Fifth International Conference on Mathematical and Numerical Aspects of Wave Propagation}, editor = {Berm{\´u}dez, A. and G{\´o}mez, D. and Hazard, C. and Joly, P. and Roberts, J.}, address = {Waves 2000, Santiago de Compostella, Spain}, pages = {921 -- 925}, year = {2000}, language = {en} } @article{PomplunBurgerSchmidtetal.2010, author = {Pomplun, Jan and Burger, Sven and Schmidt, Frank and Schliwa, Andrei and Bimberg, Dieter and Pietrzak, Agnieszka and Wenzel, Hans and Erbert, G{\"o}tz}, title = {Finite element simulation of the optical modes of semiconductor lasers}, series = {Phys. Status Solidi B}, volume = {247}, journal = {Phys. Status Solidi B}, doi = {10.1002/pssb.200945451}, pages = {846 -- 853}, year = {2010}, language = {en} } @article{PomplunBurgerZschiedrichetal.2007, author = {Pomplun, Jan and Burger, Sven and Zschiedrich, Lin and Schmidt, Frank}, title = {Adaptive finite element method for simulation of optical nano structures}, series = {Phys. Status Solidi B}, volume = {244}, journal = {Phys. Status Solidi B}, doi = {10.1002/pssb.200743192}, pages = {3419 -- 3434}, year = {2007}, language = {en} } @inproceedings{PomplunHolzloehnerBurgeretal.2007, author = {Pomplun, Jan and Holzl{\"o}hner, Ronald and Burger, Sven and Zschiedrich, Lin and Schmidt, Frank}, title = {FEM investigation of leaky modes in hollow core photonic crystal fibers}, series = {Proc. SPIE, Photonic Crystal Materials and Devices VI}, volume = {6480}, booktitle = {Proc. SPIE, Photonic Crystal Materials and Devices VI}, editor = {Adibi, Ali and Scherer, Axel and Lin, Shawn-Yu}, pages = {64800M}, year = {2007}, language = {en} } @incollection{PomplunSchmidt2010, author = {Pomplun, Jan and Schmidt, Frank}, title = {Reduced Basis Method for Electromagnetic Field Computations}, series = {Scientific Computing in Electrical Engineering SCEE 2008}, booktitle = {Scientific Computing in Electrical Engineering SCEE 2008}, publisher = {Springer Berlin Heidelberg}, doi = {10.1007/978-3-642-12294-1_12}, pages = {85}, year = {2010}, language = {en} } @inproceedings{PomplunSchmidt2008, author = {Pomplun, Jan and Schmidt, Frank}, title = {Reduced Basis Method for Nano Optical Simulations}, series = {Integrated Photonics and Nanophotonics Research and Applications}, booktitle = {Integrated Photonics and Nanophotonics Research and Applications}, publisher = {Optical Society of America}, pages = {IWD7}, year = {2008}, language = {en} } @inproceedings{PomplunSchmidtBurgeretal.2010, author = {Pomplun, Jan and Schmidt, Frank and Burger, Sven and Zschiedrich, Lin}, title = {Adaptive Reduced Basis Method for Optical Scattering Problems}, series = {Integrated Photonics Research, Silicon and Nanophotonics}, booktitle = {Integrated Photonics Research, Silicon and Nanophotonics}, publisher = {OSA}, doi = {10.1364/IPRSN.2010.IWD4}, pages = {IWD4}, year = {2010}, language = {en} } @article{PomplunZschiedrichKloseetal.2007, author = {Pomplun, Jan and Zschiedrich, Lin and Klose, Roland and Schmidt, Frank and Burger, Sven}, title = {Finite element simulation of radiation losses in photonic crystal fibers}, series = {phys. stat. sol. (a)}, volume = {204}, journal = {phys. stat. sol. (a)}, number = {11}, doi = {10.1002/pssa.200776414}, pages = {3822 -- 3837}, year = {2007}, language = {en} } @inproceedings{PomplunBurgerZschiedrichetal.2011, author = {Pomplun, Jan and Burger, Sven and Zschiedrich, Lin and Schmidt, Frank}, title = {Reduced basis method for real-time inverse scatterometry}, series = {Modelling Aspects in Optical Metrology III}, volume = {8083}, booktitle = {Modelling Aspects in Optical Metrology III}, publisher = {Proc. SPIE}, doi = {10.1117/12.889892}, pages = {808308}, year = {2011}, language = {en} } @inproceedings{PomplunWenzelBurgeretal.2012, author = {Pomplun, Jan and Wenzel, Hans and Burger, Sven and Zschiedrich, Lin and Rozova, Maria and Schmidt, Frank and Crump, Paul and Ekhteraei, Hossein and Schultz, Christoph M. and Erbert, G{\"o}tz}, title = {Thermo-optical simulation of high-power diode lasers}, series = {Proc. SPIE}, volume = {8255}, booktitle = {Proc. SPIE}, doi = {10.1117/12.909330}, pages = {825510}, year = {2012}, language = {en} } @phdthesis{Schmidt2002, author = {Schmidt, Frank}, title = {Solution of Interior-Exterior Helmholtz-Type Problems Based on the Pole Condition Concept}, year = {2002}, language = {en} } @article{Schmidt2004, author = {Schmidt, Frank}, title = {Pole Condition: A new Approach to Solve Scattering Problems}, series = {Oberwolfach Report}, volume = {1}, journal = {Oberwolfach Report}, number = {1}, publisher = {Mathematisches Forschungsinstitut Oberwolfach}, pages = {615 -- 617}, year = {2004}, language = {en} } @phdthesis{Schmidt1989, author = {Schmidt, Frank}, title = {Ingenieurm{\"a}ßige Berechnung der Feldausbreitung in optischen Bauelementen der Lichtwellenleitertechnik}, year = {1989}, language = {en} } @article{Schmidt1990, author = {Schmidt, Frank}, title = {Simulation und Herstellung von Faserschleifkopplern}, series = {Wissenschaftliche Zeitschrift der Humboldt-Universit{\"a}t zu Berlin, R. Math./Naturwiss.}, volume = {39}, journal = {Wissenschaftliche Zeitschrift der Humboldt-Universit{\"a}t zu Berlin, R. Math./Naturwiss.}, number = {2}, pages = {115 -- 118}, year = {1990}, language = {en} } @article{Schmidt1993, author = {Schmidt, Frank}, title = {An Adaptive Approach to the Numerical Solution of Fresnel's Wave Equation.}, series = {IEEE Journal of Lightwave Technology}, volume = {11}, journal = {IEEE Journal of Lightwave Technology}, number = {9}, pages = {1425 -- 1435}, year = {1993}, language = {en} } @inproceedings{Schmidt1994, author = {Schmidt, Frank}, title = {Phase-adaptive basis functions for a multilevel finite element solution of the paraxial wave equation}, series = {Euro-Opto Series}, booktitle = {Euro-Opto Series}, editor = {G. C. Righini, D.}, address = {Lindau, Germany}, pages = {57 -- 61}, year = {1994}, language = {en} } @article{Schmidt1998, author = {Schmidt, Frank}, title = {Computation of Discrete Transparent Boundary Conditions for the 2D Helmholtz equation}, series = {Optical and Quantum Electronics}, volume = {30}, journal = {Optical and Quantum Electronics}, number = {5,6}, pages = {427 -- 441}, year = {1998}, language = {en} } @inproceedings{Schmidt1998, author = {Schmidt, Frank}, title = {Simulation of Scattering and Reflection Problems via Solution of the 2D Helmholtz Equation}, series = {Integrated Photonics Research}, volume = {4}, booktitle = {Integrated Photonics Research}, pages = {408 -- 410}, year = {1998}, language = {en} } @article{Schmidt1999, author = {Schmidt, Frank}, title = {Construction of Discrete Transparent Boundary Conditions for Schr{\"o}dinger-Type equations}, series = {Surv. Math. Ind.}, volume = {9}, journal = {Surv. Math. Ind.}, pages = {87 -- 100}, year = {1999}, language = {en} } @article{RichterSchlosserSchothetal.2012, author = {Richter, Marten and Schlosser, Felix and Schoth, Mario and Burger, Sven and Schmidt, Frank and Knorr, Andreas and Mukamel, Shaul}, title = {Reconstruction of the wave functions of coupled nanoscopic emitters using a coherent optical technique}, series = {Phys. Rev. B}, volume = {86}, journal = {Phys. Rev. B}, doi = {10.1103/PhysRevB.86.085308}, pages = {085308}, year = {2012}, language = {en} } @inproceedings{RozovaPomplunZschiedrichetal.2012, author = {Rozova, Maria and Pomplun, Jan and Zschiedrich, Lin and Schmidt, Frank and Burger, Sven}, title = {3D finite element simulation of optical modes in VCSELs}, series = {Proc. SPIE}, volume = {8255}, booktitle = {Proc. SPIE}, doi = {10.1117/12.906372}, pages = {82550K}, year = {2012}, language = {en} } @article{RuprechtSchaedleSchmidtetal.2008, author = {Ruprecht, Daniel and Sch{\"a}dle, Achim and Schmidt, Frank and Zschiedrich, Lin}, title = {Transparent boundary conditions for time-dependent problems}, series = {SIAM J. Sci. Comput.}, volume = {30}, journal = {SIAM J. Sci. Comput.}, number = {5}, doi = {10.1137/070692637}, pages = {2358 -- 2385}, year = {2008}, language = {en} } @inproceedings{BurgerZschiedrichSchaedleetal.2006, author = {Burger, Sven and Zschiedrich, Lin and Sch{\"a}dle, Achim and Klose, Roland and Kettner, Benjamin and Pomplun, Jan and Pollok, T. and Schmidt, Frank}, title = {Advanced FEM Analysis of Nano-Optical Devices}, series = {Proc. Symposium on Photonics Technologies for the 7th Framework Programme}, booktitle = {Proc. Symposium on Photonics Technologies for the 7th Framework Programme}, year = {2006}, language = {en} } @inproceedings{BurgerZschiedrichSchmidtetal.2007, author = {Burger, Sven and Zschiedrich, Lin and Schmidt, Frank and K{\"o}hle, Roderick and Henkel, Thomas and K{\"u}chler, Bernd and N{\"o}lscher, Christoph}, title = {3D simulations of electromagnetic fields in nanostructures using the time-harmonic finite-element method}, series = {Modeling Aspects in Optical Metrology}, volume = {6617}, booktitle = {Modeling Aspects in Optical Metrology}, editor = {Bosse, Harald}, publisher = {Proc. SPIE}, doi = {10.1117/12.726236}, pages = {66170V}, year = {2007}, language = {en} } @inproceedings{BurgerZschiedrichSchmidtetal.2007, author = {Burger, Sven and Zschiedrich, Lin and Schmidt, Frank and K{\"o}hle, Roderick and K{\"u}chler, Bernd and N{\"o}lscher, Christoph}, title = {EMF Simulations of Isolated and Periodic 3D Photomask Patterns}, series = {Photomask Technology}, volume = {6730}, booktitle = {Photomask Technology}, publisher = {Proc. SPIE}, pages = {6630}, year = {2007}, language = {en} } @inproceedings{BurgerZschiedrichSchmidtetal.2008, author = {Burger, Sven and Zschiedrich, Lin and Schmidt, Frank and Evanschitzky, Peter and Erdmann, Andreas}, title = {Benchmark of rigorous methods for electromagnetic field simulation}, series = {Photomask Technology}, volume = {7122}, booktitle = {Photomask Technology}, editor = {Kawahira, H. and Zurbrick, L. S.}, publisher = {Proc. SPIE}, doi = {10.1117/12.801248}, pages = {71221}, year = {2008}, language = {en} } @inproceedings{BurgerZschiedrichPomplunetal.2011, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Schmidt, Frank}, title = {Rigorous simulations of 3D patterns on extreme ultraviolet lithography masks}, series = {Modelling Aspects in Optical Metrology III}, volume = {8083}, booktitle = {Modelling Aspects in Optical Metrology III}, editor = {Bodermann, Bernd}, publisher = {Proc. SPIE}, doi = {10.1117/12.889831}, pages = {80831B}, year = {2011}, language = {en} } @inproceedings{BurgerPomplunSchmidtetal.2011, author = {Burger, Sven and Pomplun, Jan and Schmidt, Frank and Zschiedrich, Lin}, title = {Finite-element method simulations of high-Q nanocavities with 1D photonic bandgap}, series = {Physics and Simulation of Optoelectronic Devices XIX}, volume = {7933}, booktitle = {Physics and Simulation of Optoelectronic Devices XIX}, publisher = {Proc. SPIE}, doi = {10.1117/12.875044}, pages = {79330T}, year = {2011}, language = {en} } @inproceedings{DeuflhardFrieseSchmidtetal.1996, author = {Deuflhard, Peter and Friese, T. and Schmidt, Frank and M{\"a}rz, Reinhard and Nolting, Hans-Peter}, title = {Effiziente Eigenmodenberechnung f{\"u}r den Entwurf integriert-optischer Chips}, series = {Mathematik - Schl{\"u}sseltechnologie f{\"u}r die Zukunft}, booktitle = {Mathematik - Schl{\"u}sseltechnologie f{\"u}r die Zukunft}, editor = {et al. Hoffmann, K.-H.}, publisher = {Springer Verlag}, pages = {267 -- 279}, year = {1996}, language = {en} } @inproceedings{FrieseDeuflhardSchmidt1999, author = {Friese, T. and Deuflhard, Peter and Schmidt, Frank}, title = {A Multigrid Method for the Complex Helmholtz Eigenvalue Problem}, series = {Procs. Eleventh International Conference on Domain Decomposition Methods in Sciences and Engineering (DD11), UK}, booktitle = {Procs. Eleventh International Conference on Domain Decomposition Methods in Sciences and Engineering (DD11), UK}, editor = {Lai, Choi-Hong and Bj{\o}rstad, Petter E. and Cross, Mark and Widlund, Olof}, publisher = {DDM.org}, pages = {19 -- 26}, year = {1999}, language = {en} } @article{FrieseSchmidtYevick2000, author = {Friese, T. and Schmidt, Frank and Yevick, David}, title = {Transparent boundary conditions for a wide-angle approximation of the one-way Helmholtz equation}, series = {J. Comput. Phys.}, volume = {165}, journal = {J. Comput. Phys.}, number = {2}, doi = {10.1006/jcph.2000.6637}, pages = {645 -- 659}, year = {2000}, language = {en} } @article{EnkrichWegenerLindenetal.2005, author = {Enkrich, Christian and Wegener, M. and Linden, S. and Burger, Sven and Zschiedrich, Lin and Schmidt, Frank and Zhou, C. and Koschny, T. and Soukoulis, C.}, title = {Magnetic metamaterials at telecommunication and visible frequencies}, series = {Phys. Rev. Lett.}, volume = {95}, journal = {Phys. Rev. Lett.}, doi = {10.1103/PhysRevLett.95.203901}, pages = {203901}, year = {2005}, language = {en} } @article{HiremathZschiedrichSchmidt2012, author = {Hiremath, Kirankumar and Zschiedrich, Lin and Schmidt, Frank}, title = {Numerical solution of nonlocal hydrodynamic Drude model for arbitrary shaped nano-plasmonic structures using Nedelec finite elements}, series = {J. Comp. Phys.}, volume = {231}, journal = {J. Comp. Phys.}, number = {17}, doi = {10.1016/j.jcp.2012.05.013}, pages = {5890 -- 5896}, year = {2012}, language = {en} } @inproceedings{HohageSchmidtZschiedrich2002, author = {Hohage, Thorsten and Schmidt, Frank and Zschiedrich, Lin}, title = {A new method for the solution of scattering problems}, series = {Proceedings of the JEE'02 Symposium}, booktitle = {Proceedings of the JEE'02 Symposium}, editor = {Michielsen, Bas and Decav{\`e}le, Francine}, publisher = {ONERA}, address = {Toulouse}, pages = {251 -- 256}, year = {2002}, language = {en} } @article{HohageSchmidtZschiedrich2003, author = {Hohage, Thorsten and Schmidt, Frank and Zschiedrich, Lin}, title = {Solving Time-Harmonic Scattering Problems Based on the Pole Condition I: Theory}, series = {SIAM J. Math. Anal.}, volume = {35}, journal = {SIAM J. Math. Anal.}, number = {1}, doi = {10.1137/S0036141002406473}, pages = {183 -- 210}, year = {2003}, language = {en} } @article{HohageSchmidtZschiedrich2003, author = {Hohage, Thorsten and Schmidt, Frank and Zschiedrich, Lin}, title = {Solving Time-Harmonic Scattering Problems Based on the Pole Condition II: Convergence of the PML Method}, series = {SIAM J. Math. Anal.}, volume = {35}, journal = {SIAM J. Math. Anal.}, number = {3}, doi = {10.1137/S0036141002406485}, pages = {547 -- 560}, year = {2003}, language = {en} } @article{LindenEnkrichDollingetal.2006, author = {Linden, S. and Enkrich, Christian and Dolling, G. and Klein, M. and Zhou, J. and Koschny, T. and Soukoulis, C. and Burger, Sven and Schmidt, Frank and Wegener, M.}, title = {Photonic metamaterials: Magnetism at Optical Frequencies}, series = {IEEE Journal of Selected Topics in Quantum Electronics}, volume = {12}, journal = {IEEE Journal of Selected Topics in Quantum Electronics}, number = {6}, doi = {10.1109/JSTQE.2006.880600}, pages = {1097 -- 1105}, year = {2006}, language = {en} } @inproceedings{LockauZschiedrichSchmidtetal.2009, author = {Lockau, D. and Zschiedrich, Lin and Schmidt, Frank and Burger, Sven and Rech, Bernd}, title = {Efficient simulation of plasmonic structures for solar cells}, series = {International Workshop on Optical Waveguide Theory and Numerical Modelling}, volume = {XVIII}, booktitle = {International Workshop on Optical Waveguide Theory and Numerical Modelling}, publisher = {Fraunhofer Institute for Applied Optics and Precision Engineering}, pages = {48}, year = {2009}, language = {en} } @inproceedings{LockauZschiedrichBurgeretal.2011, author = {Lockau, D. and Zschiedrich, Lin and Burger, Sven and Schmidt, Frank and Ruske, F. and Rech, Bernd}, title = {Rigorous optical simulation of light management in crystalline silicon thin film solar cells with rough interface textures}, series = {Physics and Simulation of Optoelectronic Devices XIX}, volume = {7933}, booktitle = {Physics and Simulation of Optoelectronic Devices XIX}, publisher = {Proc. SPIE}, doi = {10.1117/12.874967}, pages = {79330M}, year = {2011}, language = {en} } @inproceedings{KleemannKurzHetzleretal.2011, author = {Kleemann, B. and Kurz, J. and Hetzler, J. and Pomplun, Jan and Burger, Sven and Zschiedrich, Lin and Schmidt, Frank}, title = {Fast online inverse scattering with Reduced Basis Method (RBM) for a 3D phase grating with specific line roughness}, series = {Modelling Aspects in Optical Metrology III}, volume = {8083}, booktitle = {Modelling Aspects in Optical Metrology III}, publisher = {Proc. SPIE}, doi = {10.1117/12.889364}, pages = {808309}, year = {2011}, language = {en} } @inproceedings{HammerschmidtLockauBurgeretal.2012, author = {Hammerschmidt, Martin and Lockau, Daniel and Burger, Sven and Schmidt, Frank and Schwanke, Christoph and Kirner, Simon and Calnan, Sonya and Stannowski, Bernd and Rech, Bernd}, title = {3D optical modeling of thin-film a-Si/mc-Si tandem solar cells with random textured interfaces using FEM}, series = {Renewable Energy and the Environment Optics and Photonics Congress}, booktitle = {Renewable Energy and the Environment Optics and Photonics Congress}, publisher = {Optical Society of America}, doi = {10.1364/E2.2012.JM5A.15}, pages = {JM5A.15}, year = {2012}, language = {en} } @article{KarlKettnerBurgeretal.2009, author = {Karl, M. and Kettner, Benjamin and Burger, Sven and Schmidt, Frank and Kalt, H. and Hetterich, M.}, title = {Dependencies of micro-pillar cavity quality factors calculated with finite element methods}, series = {Optics Express}, volume = {17}, journal = {Optics Express}, doi = {10.1364/OE.17.001144}, pages = {1144}, year = {2009}, language = {en} } @inproceedings{KettnerSchmidt2011, author = {Kettner, Benjamin and Schmidt, Frank}, title = {The pole condition as transparent boundary condition for resonance problems}, series = {Physics and Simulation of Optoelectronic Devices XIX}, volume = {7933}, booktitle = {Physics and Simulation of Optoelectronic Devices XIX}, publisher = {Proc. SPIE}, doi = {10.1117/12.874752}, pages = {79331B}, year = {2011}, language = {en} } @inproceedings{KloseBurgerSchmidtetal.2005, author = {Klose, Roland and Burger, Sven and Schmidt, Frank and Zschiedrich, Lin}, title = {A multilevel method for the computation of eigenmodes in 3D photonic crystals}, series = {Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic Devices}, booktitle = {Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic Devices}, doi = {10.1109/NUSOD.2005.1518135}, pages = {61 -- 62}, year = {2005}, language = {en} } @article{BurgerZschiedrichPomplunetal.2013, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Schmidt, Frank and Bodermann, Bernd}, title = {Fast simulation method for parameter reconstruction in optical metrology}, series = {Proc. SPIE}, volume = {8681}, journal = {Proc. SPIE}, doi = {10.1117/12.2011154}, pages = {868119}, year = {2013}, language = {en} } @inproceedings{ZschiedrichBurgerKettneretal.2006, author = {Zschiedrich, Lin and Burger, Sven and Kettner, Benjamin and Schmidt, Frank}, title = {Advanced Finite Element Method for Nano-Resonators}, series = {Proc. SPIE}, volume = {6115}, booktitle = {Proc. SPIE}, doi = {10.1117/12.646252}, pages = {611515}, year = {2006}, language = {en} } @inproceedings{ZschiedrichBurgerKloseetal.2005, author = {Zschiedrich, Lin and Burger, Sven and Klose, Roland and Sch{\"a}dle, Achim and Schmidt, Frank}, title = {JCMmode: an adaptive finite element solver for the computation of leaky modes}, series = {Integrated Optics: Devices, Materials, and Technologies IX}, volume = {5728}, booktitle = {Integrated Optics: Devices, Materials, and Technologies IX}, editor = {Sidorin, Y. and W{\"a}chter, Christoph}, publisher = {Proc. SPIE}, doi = {10.1117/12.590372}, pages = {192 -- 202}, year = {2005}, language = {en} } @inproceedings{ZschiedrichBurgerPomplunetal.2007, author = {Zschiedrich, Lin and Burger, Sven and Pomplun, Jan and Schmidt, Frank}, title = {Goal oriented adaptive finite element method for precise simulation of optical components}, series = {Proc. SPIE, Integrated Optics}, volume = {6475}, booktitle = {Proc. SPIE, Integrated Optics}, editor = {Sidorin, Y. and Waechter, Ch.}, pages = {64750H}, year = {2007}, language = {en} } @inproceedings{ZschiedrichBurgerSchaedleetal.2008, author = {Zschiedrich, Lin and Burger, Sven and Sch{\"a}dle, Achim and Schmidt, Frank}, title = {A rigorous finite-element domain decomposition method for electromagnetic near field simulations}, series = {Optical Microlithography XXI}, volume = {6924}, booktitle = {Optical Microlithography XXI}, editor = {Levinson, Harry and Dusa, Mircea}, publisher = {SPIE}, doi = {10.1117/12.771989}, year = {2008}, language = {en} } @inproceedings{ZschiedrichBurgerSchaedleetal.2005, author = {Zschiedrich, Lin and Burger, Sven and Sch{\"a}dle, Achim and Schmidt, Frank}, title = {Domain decomposition method for electromagnetic scattering problems: application to EUV lithography}, series = {Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic devices}, booktitle = {Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic devices}, doi = {10.1109/NUSOD.2005.1518132}, pages = {55 -- 56}, year = {2005}, language = {en} } @article{ZschiedrichGreinerBurgeretal.2013, author = {Zschiedrich, Lin and Greiner, Horst and Burger, Sven and Schmidt, Frank}, title = {Numerical analysis of nanostructures for enhanced light extraction from OLEDs}, series = {Proc. SPIE}, volume = {8641}, journal = {Proc. SPIE}, doi = {10.1117/12.2001132}, pages = {86410B}, year = {2013}, language = {en} } @article{ArellanoMingaleevKoltchanovetal.2013, author = {Arellano, Cristina and Mingaleev, Sergei F. and Koltchanov, Igor and Richter, Andre and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {Efficient design of photonic integrated circuits (PICs) by combining device- and circuit- level simulation tools}, series = {Proc. SPIE}, volume = {8627}, journal = {Proc. SPIE}, doi = {10.1117/12.2004378}, pages = {862711}, year = {2013}, language = {en} } @article{BurgerZschiedrichPomplunetal.2013, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Blome, Mark and Schmidt, Frank}, title = {Advanced finite-element methods for design and analysis of nano-optical structures: Applications}, series = {Proc. SPIE}, volume = {8642}, journal = {Proc. SPIE}, doi = {10.1117/12.2001094}, pages = {864205}, year = {2013}, language = {en} } @article{HammerschmidtLockauBurgeretal.2013, author = {Hammerschmidt, Martin and Lockau, Daniel and Burger, Sven and Schmidt, Frank and Schwanke, Christoph and Kirner, Simon and Calnan, Sonya and Stannowski, Bernd and Rech, Bernd}, title = {FEM-based optical modeling of silicon thin-film tandem solar cells with randomly textured interfaces in 3D}, series = {Proc. SPIE}, volume = {8620}, journal = {Proc. SPIE}, doi = {10.1117/12.2001789}, pages = {86201H}, year = {2013}, language = {en} } @inproceedings{ZschiedrichGreinerPomplunetal.2012, author = {Zschiedrich, Lin and Greiner, Horst and Pomplun, Jan and Hammerschmidt, Martin and Burger, Sven and Schmidt, Frank}, title = {FEM simulations of light extraction from nanostructured organic light-emitting diodes}, series = {Renewable Energy and the Environment Optics and Photonics Congress}, booktitle = {Renewable Energy and the Environment Optics and Photonics Congress}, publisher = {Optical Society of America}, doi = {10.1364/SOLED.2012.LT2B.5}, pages = {LT2B.5}, year = {2012}, language = {en} } @article{ZschiedrichKloseSchaedleetal.2006, author = {Zschiedrich, Lin and Klose, Roland and Sch{\"a}dle, Achim and Schmidt, Frank}, title = {A new finite element realization of the Perfectly Matched Layer Method for Helmholtz scattering problems on polygonal domains in 2D}, series = {J. Comput. Appl. Math.}, volume = {188}, journal = {J. Comput. Appl. Math.}, doi = {10.1016/j.cam.2005.03.047}, pages = {12 -- 32}, year = {2006}, language = {en} } @inproceedings{ZschiedrichSchmidt2008, author = {Zschiedrich, Lin and Schmidt, Frank}, title = {Finite element simulation of light propagation in non-periodic mask patterns}, series = {Photomask and Next-Generation Lithography Mask Technology XV}, volume = {7028}, booktitle = {Photomask and Next-Generation Lithography Mask Technology XV}, editor = {Horiuchi, Toshiyuki}, publisher = {SPIE}, year = {2008}, language = {en} } @inproceedings{BeckerXavierPreideletal.2013, author = {Becker, Christiane and Xavier, Jolly and Preidel, Veit and Wyss, Philippe and Sontheimer, Tobias and Rech, Bernd and Probst, J{\"u}rgen and H{\"u}lsen, Christoph and L{\"o}chel, Bernd and Erko, Alexei and Burger, Sven and Schmidt, Frank and Back, Franziska and Rudigier-Voigt, Eveline}, title = {Nanophotonic light trapping in polycrystalline silicon thin-film solar cells using periodically nanoimprint-structured glass substrates}, series = {Proc. SPIE}, volume = {8824}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2023871}, pages = {88240D}, year = {2013}, language = {en} } @inproceedings{BurgerZschiedrichPomplunetal.2013, author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Schmidt, Frank}, title = {Finite-element based electromagnetic field simulations: Benchmark results for isolated structures}, series = {Proc. SPIE}, volume = {8880}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2026213}, pages = {88801Z}, year = {2013}, language = {en} } @book{LavrinenkoLaegsgaardGregersenetal., author = {Lavrinenko, Andrei and Laegsgaard, Jesper and Gregersen, Niels and Schmidt, Frank and Soendergaard, Thomas}, title = {Numerical Methods in Photonics}, editor = {Wyant, James C.}, publisher = {CRC Press}, isbn = {9781466563889}, language = {en} } @inproceedings{ManleySchmidtSchmid, author = {Manley, Phillip and Schmidt, Frank and Schmid, Martina}, title = {Light extraction from plasmonic particles with dielectric shells and overcoatings}, series = {Renewable Energy and the Environment}, booktitle = {Renewable Energy and the Environment}, publisher = {Optical Society of America}, doi = {10.1364/PV.2013.PW3B.7}, pages = {PW3B.7}, language = {en} } @incollection{LedentsovJrShchukinLedentsovJretal., author = {Ledentsov, Jr., Nikolay and Shchukin, Vitaly and Ledentsov, Jr., Nikolay and Kropp, J{\"o}rg-R. and Burger, Sven and Schmidt, Frank}, title = {New Generation of Vertical-Cavity Surface-Emitting Lasers for Optical Interconnects}, series = {Future Trends in Microelectronics: Journey into the Unknown}, booktitle = {Future Trends in Microelectronics: Journey into the Unknown}, publisher = {John Wiley \& Sons}, doi = {10.1002/9781119069225.ch3-5}, language = {en} } @incollection{Schmidt, author = {Schmidt, Frank}, title = {Photonics}, series = {Handbook of Optoelectronic Device Modeling and Simulation}, booktitle = {Handbook of Optoelectronic Device Modeling and Simulation}, editor = {Piprek, Joachim}, publisher = {CRC Press}, isbn = {9781498749381}, language = {en} } @article{GutschePoulikakosHammerschmidtetal., author = {Gutsche, Philipp and Poulikakos, Lisa and Hammerschmidt, Martin and Burger, Sven and Schmidt, Frank}, title = {Time-harmonic optical chirality in inhomogeneous space}, series = {Proc. SPIE}, volume = {9756}, journal = {Proc. SPIE}, doi = {10.1117/12.2209551}, pages = {97560X}, language = {en} } @misc{GutschePoulikakosBurgeretal., author = {Gutsche, Philipp and Poulikakos, Lisa and Burger, Sven and Hammerschmidt, Martin and Schmidt, Frank}, title = {Optical chirality: conservation law in arbitrary space}, series = {606. WE-Heraeus-Seminar on Nanophotonics and Complex Spatial Modes of Light}, journal = {606. WE-Heraeus-Seminar on Nanophotonics and Complex Spatial Modes of Light}, abstract = {The introduction of the near-field quantity of optical chirality has emerged in various numerical and few experimental studies of local chirality enhancement due to its relation to the excitation rate of chiral molecules. This time-even pseudoscalar has been dismissed as being a higher-order version of helicity. Nevertheless, we revisit the derivation of the underlying conservation law and define optical chirality in media similar to. We identify the mechanism of chirality conversion by either inhomogeneous or anisotropic space to complement the conservation of optical chirality. The conservation law of optical chirality in arbitrary space enables the extension of the concept of polarization to the near-field where no distiniguished propagation direction of light is present. We show that the connection of electromagnetic energy and optical chirality provide the ability to define a circular polarization basis in time-harmonic near-field analysis. In order to illustrate our theory, we present electromagnetic field simulations of simple as well as more complex nanostructures. Results using the well-known far-field polarization concept are readily reproduced and extended from the point of view of chirality conversion.}, language = {en} } @article{HammerschmidtBarthPomplunetal., author = {Hammerschmidt, Martin and Barth, Carlo and Pomplun, Jan and Burger, Sven and Becker, Christiane and Schmidt, Frank}, title = {Reconstruction of photonic crystal geometries using a reduced basis method for nonlinear outputs}, series = {Proc. SPIE}, volume = {9756}, journal = {Proc. SPIE}, doi = {10.1117/12.2212482}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-58187}, pages = {97561R}, abstract = {Maxwell solvers based on the hp-adaptive finite element method allow for accurate geometrical modeling and high numerical accuracy. These features are indispensable for the optimization of optical properties or reconstruction of parameters through inverse processes. High computational complexity prohibits the evaluation of the solution for many parameters. We present a reduced basis method (RBM) for the time-harmonic electromagnetic scattering problem allowing to compute solutions for a parameter configuration orders of magnitude faster. The RBM allows to evaluate linear and nonlinear outputs of interest like Fourier transform or the enhancement of the electromagnetic field in milliseconds. We apply the RBM to compute light-scattering off two dimensional photonic crystal structures made of silicon and reconstruct geometrical parameters.}, language = {en} } @article{HammerschmidtHerrmannPomplunetal., author = {Hammerschmidt, Martin and Herrmann, Sven and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {Model order reduction for the time-harmonic Maxwell equation applied to complex nanostructures}, series = {Proc. SPIE}, volume = {9742}, journal = {Proc. SPIE}, doi = {10.1117/12.2212367}, pages = {97420M}, abstract = {Fields such as optical metrology and computational lithography require fast and efficient methods for solving the time-harmonic Maxwell's equation. Highly accurate geometrical modelling and numerical accuracy at low computational costs are a prerequisite for any simulation study of complex nano-structured photonic devices. We present a reduced basis method (RBM) for the time-harmonic electromagnetic scattering problem based on the hp-adaptive finite element solver JCMsuite capable of handling geometric and non-geometric parameter dependencies allowing for online evaluations in milliseconds. We apply the RBM to compute light-scattering at optical wavelengths of periodic arrays of fin field-effect transistors (FinFETs) where geometrical properties such as the width and height of the fin and gate can vary in a large range.}, language = {en} } @misc{GutscheLaeuterSchmidt, author = {Gutsche, Philipp and L{\"a}uter, Matthias and Schmidt, Frank}, title = {Parameter-dependent Parallel Block Sparse Arnoldi and D{\"o}hler Algorithms on Distributed Systems}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-58202}, abstract = {We summarize the basics and first results of the analyses within our ZIB Bridge Project and give an outlook on further studies broadening the usage of hardware acceleration within the Finite Element Method (FEM) based solution of Maxwell's equations.}, language = {en} } @article{HammerschmidtHerrmannPomplunetal., author = {Hammerschmidt, Martin and Herrmann, Sven and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {Reduced basis method for electromagnetic scattering problem: a case study for FinFETs}, series = {Optical and Quantum Electronics}, volume = {48}, journal = {Optical and Quantum Electronics}, doi = {10.1007/s11082-016-0530-1}, pages = {250}, abstract = {Optical 3D simulations in many-query and real-time contexts require new solution strategies. We study an adaptive, error controlled reduced basis method for solving parametrized time-harmonic optical scattering problems. Application fields are, among others, design and optimization problems of nano-optical devices as well as inverse problems for parameter reconstructions occurring e. g. in optical metrology. The reduced basis method pre- sented here relies on a finite element modeling of the scattering problem with parametrization of materials, geometries and sources.}, language = {en} } @article{JaegerBarthHammerschmidtetal., author = {J{\"a}ger, Klaus and Barth, Carlo and Hammerschmidt, Martin and Herrmann, Sven and Burger, Sven and Schmidt, Frank and Becker, Christiane}, title = {Simulations of sinusoidal nanotextures for coupling light into c-Si thin-film solar cells}, series = {Opt. Express}, volume = {24}, journal = {Opt. Express}, doi = {10.1364/OE.24.00A569}, pages = {A569}, language = {en} } @article{LedentsovJrShchukinKroppetal., author = {Ledentsov, Jr., Nikolay and Shchukin, Vitaly and Kropp, J{\"o}rg-R. and Burger, Sven and Schmidt, Frank and Ledentsov, Jr., Nikolay}, title = {Direct visualization of the in-plane leakage of high-order transverse modes in vertical-cavity surface-emitting lasers mediated by oxide-aperture engineering}, series = {Proc. SPIE}, volume = {9766}, journal = {Proc. SPIE}, doi = {10.1117/12.2208909}, pages = {976608}, language = {en} } @article{PomplunBurgerZschiedrichetal., author = {Pomplun, Jan and Burger, Sven and Zschiedrich, Lin and Gutsche, Philipp and Schmidt, Frank}, title = {Method for fast computation of angular light scattering spectra from 2D periodic arrays}, series = {Proc. SPIE}, volume = {9778}, journal = {Proc. SPIE}, doi = {10.1117/12.2219666}, pages = {977839}, language = {en} } @inproceedings{PomplunBurgerRozovaetal.2011, author = {Pomplun, Jan and Burger, Sven and Rozova, Maria and Zschiedrich, Lin and Schmidt, Frank}, title = {Finite element simulation of optical modes in VCSELs}, series = {Numerical Simulation of Optoelectronic Devices (NUSOD), 11th International Conference on}, booktitle = {Numerical Simulation of Optoelectronic Devices (NUSOD), 11th International Conference on}, doi = {10.1109/NUSOD.2011.6041170}, pages = {119 -- 120}, year = {2011}, language = {en} } @article{RuprechtSchaedleSchmidt, author = {Ruprecht, Daniel and Sch{\"a}dle, Achim and Schmidt, Frank}, title = {Transparent boundary conditions based on the pole condition for time-dependent, two-dimensional problems}, series = {Numerical Methods for Partial Differential Equations}, volume = {29}, journal = {Numerical Methods for Partial Differential Equations}, number = {4}, doi = {10.1002/num.21759}, pages = {1367 -- 1390}, language = {en} } @misc{HammerschmidtPomplunBurgeretal., author = {Hammerschmidt, Martin and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {Adaptive sampling strategies for efficient parameter scans in nano-photonic device simulations}, issn = {1438-0064}, doi = {10.1117/12.2036363}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-50395}, abstract = {Rigorous optical simulations are an important tool in optimizing scattering properties of nano-photonic devices and are used, for example, in solar cell optimization. The finite element method (FEM) yields rigorous, time-harmonic, high accuracy solutions of the full 3D vectorial Maxwell's equations [1] and furthermore allows for great flexibility and accuracy in the geometrical modeling of these often complex shaped 3D nano-structures. A major drawback of frequency domain methods is the limitation of single frequency evaluations. For example the accurate computation of the short circuit current density of an amorphous silicon / micro-crystalline multi-junction thin film solar cell may require the solution of Maxwell's equations for over a hundred different wavelengths if an equidistant sampling strategy is employed. Also in optical metrology, wavelength scans are frequently used to reconstruct unknown geometrical and material properties of optical systems numerically from measured scatterometric data. In our contribution we present several adaptive numerical integration and sampling routines and study their efficiency in the context of the determination of generation rate profiles of solar cells. We show that these strategies lead to a reduction in the computational effort without loss of accuracy. We discuss the employment of tangential information in a Hermite interpolation scheme to achieve similar accuracy on coarser grids. We explore the usability of these strategies for scatterometry and solar cell simulations.}, language = {en} } @misc{HammerschmidtLockauZschiedrichetal., author = {Hammerschmidt, Martin and Lockau, Daniel and Zschiedrich, Lin and Schmidt, Frank}, title = {Optical modelling of incoherent substrate light-trapping in silicon thin film multi-junction solar cells with finite elements and domain decomposition}, issn = {1438-0064}, doi = {10.1117/12.2036346}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-50410}, abstract = {In many experimentally realized applications, e.g. photonic crystals, solar cells and light-emitting diodes, nano-photonic systems are coupled to a thick substrate layer, which in certain cases has to be included as a part of the optical system. The finite element method (FEM) yields rigorous, high accuracy solutions of full 3D vectorial Maxwell's equations [1] and allows for great flexibility and accuracy in the geometrical modelling. Time-harmonic FEM solvers have been combined with Fourier methods in domain decomposition algorithms to compute coherent solutions of these coupled system. [2,3] The basic idea of a domain decomposition approach lies in a decomposition of the domain into smaller subdomains, separate calculations of the solutions and coupling of these solutions on adjacent subdomains. In experiments light sources are often not perfectly monochromatic and hence a comparision to simulation results might only be justified if the simulation results, which include interference patterns in the substrate, are spectrally averaged. In this contribution we present a scattering matrix domain decomposition algorithm for Maxwell's equations based on FEM. We study its convergence and advantages in the context of optical simulations of silicon thin film multi-junction solar cells. This allows for substrate light-trapping to be included in optical simulations and leads to a more realistic estimation of light path enhancement factors in thin-film devices near the band edge.}, language = {en} } @inproceedings{LockauHammerschmidtHaschkeetal., author = {Lockau, Daniel and Hammerschmidt, Martin and Haschke, Jan and Blome, Mark and Ruske, Florian and Schmidt, Frank and Rech, Bernd}, title = {A comparison of scattering and non-scattering anti-reflection designs for back contacted polycrystalline thin film silicon solar cells in superstrate configuration}, series = {Proc. SPIE}, volume = {9140}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2052362}, pages = {914006}, language = {en} } @misc{LockauHammerschmidtBlomeetal., author = {Lockau, Daniel and Hammerschmidt, Martin and Blome, Mark and Schmidt, Frank}, title = {Optics of thin film solar cells}, series = {MATHEON-Mathematics for Key Technologies}, volume = {1}, journal = {MATHEON-Mathematics for Key Technologies}, editor = {Deuflhard, Peter and et al.,}, publisher = {European Mathematical Society}, doi = {10.4171/137}, pages = {278 -- 279}, language = {en} } @incollection{ManleyBurgerSchmidtetal., author = {Manley, Phillip and Burger, Sven and Schmidt, Frank and Schmid, Martina}, title = {Design Principles for Plasmonic Nanoparticle Devices}, series = {Progress in Nonlinear Nano-Optics}, volume = {XXI}, booktitle = {Progress in Nonlinear Nano-Optics}, editor = {Sakabe, Shuji and Lienau, Christoph and Grunwald, R{\"u}diger}, edition = {Nano-Optics and Nanophotonics}, publisher = {Springer}, doi = {10.1007/978-3-319-12217-5_13}, pages = {223 -- 247}, language = {en} } @article{LedentsovJrShchukinKroppetal., author = {Ledentsov, Jr., Nikolay and Shchukin, Vitaly and Kropp, J{\"o}rg-R. and Zschiedrich, Lin and Schmidt, Frank and Ledentsov, Jr., Nikolay}, title = {Resonant cavity light-emitting diodes based on dielectric passive cavity structures}, series = {Proc. SPIE}, volume = {10124}, journal = {Proc. SPIE}, doi = {10.1117/12.2253089}, pages = {101240O}, language = {en} } @article{YevickFrieseSchmidt2001, author = {Yevick, David and Friese, T. and Schmidt, Frank}, title = {A Comparison of Transparent Boundary Conditions for the Fresnel Equation}, series = {J. Comput. Phys.}, volume = {168}, journal = {J. Comput. Phys.}, number = {2}, pages = {433 -- 444}, year = {2001}, language = {en} } @article{YevickYuSchmidt1997, author = {Yevick, David and Yu, J. and Schmidt, Frank}, title = {Analytic Studies of Absorbing and Impedance-Matched Boundary Layers}, series = {IEEE Photonics Technology Letters}, volume = {9}, journal = {IEEE Photonics Technology Letters}, doi = {10.1109/68.554499}, pages = {73 -- 75}, year = {1997}, language = {en} } @article{SchlosserSchothBurgeretal.2011, author = {Schlosser, Felix and Schoth, Mario and Burger, Sven and Schmidt, Frank and Knorr, Andreas and Mukamel, S. and Richter, Marten}, title = {Ultrafast nonlinear spectroscopy with spatially confined fields}, series = {AIP Conference Proceedings}, volume = {1398}, journal = {AIP Conference Proceedings}, publisher = {AIP}, doi = {10.1063/1.3644223}, pages = {94 -- 96}, year = {2011}, language = {en} } @inproceedings{SchlosserSchothBurgeretal.2012, author = {Schlosser, Felix and Schoth, Mario and Burger, Sven and Schmidt, Frank and Knorr, Andreas and Mukamel, Shaul and Richter, Marten}, title = {Coherent Nonlinear Spectroscopy with Spatiotemporally Controlled Fields}, series = {CLEO/QELS}, booktitle = {CLEO/QELS}, publisher = {Optical Society of America}, doi = {10.1364/QELS.2012.QF3D.6}, pages = {QF3D.6}, year = {2012}, language = {en} } @inproceedings{SchlosserSchothHiremathetal.2012, author = {Schlosser, Felix and Schoth, Mario and Hiremath, Kirankumar and Burger, Sven and Schmidt, Frank and Knorr, Andreas and Mukamel, Shaul and Richter, Marten}, title = {Combining nanooptical fields and coherent spectroscopy on systems with delocalized excitons}, series = {Proc. SPIE}, volume = {8260}, booktitle = {Proc. SPIE}, doi = {10.1117/12.906671}, pages = {82601V}, year = {2012}, language = {en} } @inproceedings{SchmidtPomplunZschiedrichetal.2011, author = {Schmidt, Frank and Pomplun, Jan and Zschiedrich, Lin and Burger, Sven}, title = {Fast online simulation of 3D nanophotonic structures by the reduced basis method}, series = {Integrated Optics: Devices, Materials, and Technologies XV}, volume = {7941}, booktitle = {Integrated Optics: Devices, Materials, and Technologies XV}, publisher = {Proc. SPIE}, doi = {10.1117/12.874726}, pages = {79410G}, year = {2011}, language = {en} } @misc{Schmidt1986, type = {Master Thesis}, author = {Schmidt, Frank}, title = {Untersuchung heteronomer Differentialgleichungen mit Hilfe des Analogrechners}, year = {1986}, language = {en} } @article{SchmidtNolting1992, author = {Schmidt, Frank and Nolting, Hans-Peter}, title = {Adaptive Multilevel Beam Propagation Method}, series = {IEEE Photonics Technology Letter}, volume = {4}, journal = {IEEE Photonics Technology Letter}, pages = {1381 -- 1383}, year = {1992}, language = {en} } @inproceedings{SchmidtNolting1992, author = {Schmidt, Frank and Nolting, Hans-Peter}, title = {An Adaptive Approach to a Beam Propagation Method}, series = {Integrated Photonics Research}, booktitle = {Integrated Photonics Research}, address = {New Orleans, Louisiana, USA}, pages = {302 -- 303}, year = {1992}, language = {en} } @inproceedings{SchaedleRuprechtSchmidt2007, author = {Sch{\"a}dle, Achim and Ruprecht, Daniel and Schmidt, Frank}, title = {Transparent boundary conditions - the pole condition approach}, series = {Proceedings of Waves 2007}, booktitle = {Proceedings of Waves 2007}, editor = {et.al., N. Biggs}, pages = {301 -- 303}, year = {2007}, language = {en} } @article{SchmidtYevick1997, author = {Schmidt, Frank and Yevick, David}, title = {Discrete Transparent Boundary Conditions for Schr{\"o}dinger-Type Equations}, series = {J. Comput. Phys.}, volume = {134}, journal = {J. Comput. Phys.}, number = {1}, doi = {10.1006/jcph.1997.5675}, pages = {96 -- 107}, year = {1997}, language = {en} } @inproceedings{SchmidtYevick1997, author = {Schmidt, Frank and Yevick, David}, title = {Discrete Transparent Boundary Conditions for the Fresnel Equation}, series = {Proceedings of the 8th European Conference on Integrated Optics}, booktitle = {Proceedings of the 8th European Conference on Integrated Optics}, address = {Royal Institute of Technology, Stockholm, Sweden}, pages = {222 -- 225}, year = {1997}, language = {en} } @article{SchaedleZschiedrichBurgeretal.2007, author = {Sch{\"a}dle, Achim and Zschiedrich, Lin and Burger, Sven and Klose, Roland and Schmidt, Frank}, title = {Domain Decomposition Method for Maxwell's Equations}, series = {J. Comput. Phys.}, volume = {226}, journal = {J. Comput. Phys.}, doi = {10.1016/j.jcp.2007.04.017}, pages = {477 -- 493}, year = {2007}, language = {en} } @article{BeckerLockauSontheimeretal.2012, author = {Becker, Christiane and Lockau, Daniel and Sontheimer, Tobias and Schubert-Bischoff, Peter and Rudigier-Voigt, Eveline and Bockmeyer, Matthias and Schmidt, Frank and Rech, Bernd}, title = {Large-area 2D periodic crystalline silicon nanodome arrays on nanoimprinted glass exhibiting photonic band structure effects}, series = {Nanotechnology}, volume = {23}, journal = {Nanotechnology}, number = {13}, doi = {10.1088/0957-4484/23/13/135302}, pages = {135302}, year = {2012}, language = {en} } @article{LockauSontheimerBeckeretal.2013, author = {Lockau, Daniel and Sontheimer, Tobias and Becker, Christiane and Rudigier-Voigt, Eveline and Schmidt, Frank and Rech, Bernd}, title = {Nanophotonic light trapping in 3-dimensional thin-film silicon architectures}, series = {Opt. Express}, volume = {21}, journal = {Opt. Express}, doi = {10.1364/OE.21.000A42}, pages = {A42}, year = {2013}, language = {en} } @article{LockauSontheimerPreideletal.2013, author = {Lockau, Daniel and Sontheimer, Tobias and Preidel, Veit and Becker, Christiane and Ruske, Florian and Schmidt, Frank and Rech, Bernd}, title = {Optical properties and Limits of a Large-Area Periodic Nanophotonic Light Trapping Design for Polycrystalline Silicon Thin Film Solar Cells}, series = {MRS Proceedings}, volume = {1493}, journal = {MRS Proceedings}, doi = {10.1557/opl.2013.28}, pages = {59 -- 64}, year = {2013}, language = {en} } @inproceedings{JaegerBarthHammerschmidtetal., author = {J{\"a}ger, Klaus and Barth, Carlo and Hammerschmidt, Martin and Herrmann, Sven and Burger, Sven and Schmidt, Frank and Becker, Christiane}, title = {Sinusoidal Nanotextures for Enhanced Light Management in Thin-Film Solar Cells}, series = {28th Workshop on Quantum Solar Energy Conversion - (QUANTSOL)}, booktitle = {28th Workshop on Quantum Solar Energy Conversion - (QUANTSOL)}, editor = {European Society for Quantum Solar Energy Conversion,}, language = {en} } @article{JaegerKoeppelBarthetal., author = {J{\"a}ger, Klaus and K{\"o}ppel, Grit and Barth, Carlo and Hammerschmidt, Martin and Herrmann, Sven and Burger, Sven and Schmidt, Frank and Becker, Christiane}, title = {Sinusoidal gratings for optimized light management in c-Si thin-film solar cells}, series = {Proc. SPIE}, volume = {9898}, journal = {Proc. SPIE}, doi = {10.1117/12.2225459}, pages = {989808}, language = {en} } @inproceedings{LedentsovJrKroppShchukinetal., author = {Ledentsov, Jr., Nikolay and Kropp, J{\"o}rg-R. and Shchukin, Vitaly and Steinle, Gunther and Ledentsov, Jr., Nikolay and Turkiewicz, Jarek P. and Wu, Bo and Shaofeng, Qiu and Ma, Yanan and Zhiyong, Feng and Burger, Sven and Schmidt, Frank and Caspar, Christoph and Freund, Ronald and Choquette, Kent D.}, title = {High-speed modulation, wavelength, and mode control in vertical-cavity surface-emitting lasers}, series = {Proc. SPIE}, volume = {9381}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2082951}, pages = {93810F}, language = {en} } @inproceedings{ShchukinLedentsovJrKroppetal., author = {Shchukin, Vitaly and Ledentsov, Jr., Nikolay and Kropp, J{\"o}rg-R. and Steinle, Gunther and Ledentsov, Jr., Nikolay and Choquette, Kent D. and Burger, Sven and Schmidt, Frank}, title = {Engineering of optical modes in vertical-cavity microresonators by aperture placement: applications to single-mode and near-field lasers}, series = {Proc. SPIE}, volume = {9381}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2077012}, pages = {93810V}, language = {en} } @inproceedings{BurgerZschiedrichPomplunetal., author = {Burger, Sven and Zschiedrich, Lin and Pomplun, Jan and Herrmann, Sven and Schmidt, Frank}, title = {hp-finite element method for simulating light scattering from complex 3D structures}, series = {Proc. SPIE}, volume = {9424}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2085795}, pages = {94240Z}, language = {en} } @misc{GutscheJuddSchmidt, author = {Gutsche, Philipp and Judd, Thomas and Schmidt, Frank}, title = {A convergence study of different Rigorous Coupled Wave Analysis (RCWA) approaches to time-harmonic electromagnetic scattering problems with applications to nanooptical structures}, series = {Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG-Fr{\"u}hjahrstagung Berlin 2014)}, journal = {Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG-Fr{\"u}hjahrstagung Berlin 2014)}, abstract = {Reliable numerical simulations of nano-optical structures are the key for design and pre-fabrication processes in diverse disciplines such as lithography in semiconductor industries, spectroscopy of biological molecules, optimization of quantum dot cavities for single-photon sources, and computation of atomic forces like the Casimir Effect. For these purposes a variety of different methods, e.g. FDTD, FEM and RCWA, are in use. On the one hand, FDTD and FEM are investigated intensively - both in mathematics and numerical experiments - and their approximations and convergence properties are well known. On the other hand, there is a lack of these insights in RCWA. In spite of this, RCWA is commonly used to simulate a wide range of systems. We review historical and modern contributions to convergence improvements with respect to RCWA from the early sugesstions to modern developments. We study the convergence rates of the open-source software S4 and analyze the algorithmic properties in detail. Furthermore, we compare RCWA and FEM simulations for different classes of problems including 1D-binary gratings and 2D-periodic photonic crystals.}, language = {en} } @inproceedings{BurgerGutscheHammerschmidtetal., author = {Burger, Sven and Gutsche, Philipp and Hammerschmidt, Martin and Herrmann, Sven and Pomplun, Jan and Schmidt, Frank and Wohlfeil, Benjamin and Zschiedrich, Lin}, title = {Hp-finite-elements for simulating electromagnetic fields in optical devices with rough textures}, series = {Proc. SPIE}, volume = {9630}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2190119}, pages = {96300S}, language = {en} } @inproceedings{BurgerHammerschmidtHerrmannetal., author = {Burger, Sven and Hammerschmidt, Martin and Herrmann, Sven and Pomplun, Jan and Schmidt, Frank}, title = {Reduced basis methods for optimization of nano-photonic devices}, series = {Proc. Int. Conf. Numerical Simulation of Optoelectronic Devices (NUSOD)}, booktitle = {Proc. Int. Conf. Numerical Simulation of Optoelectronic Devices (NUSOD)}, doi = {10.1109/NUSOD.2015.7292871}, pages = {159}, language = {en} } @article{LedentsovJrShchukinLedentsovJretal., author = {Ledentsov, Jr., Nikolay and Shchukin, Vitaly and Ledentsov, Jr., Nikolay and Kropp, J{\"o}rg-R. and Burger, Sven and Schmidt, Frank}, title = {Direct Evidence of the Leaky Emission in Oxide-Confined Vertical Cavity Lasers}, series = {IEEE J. Quant. Electron.}, volume = {52}, journal = {IEEE J. Quant. Electron.}, number = {3}, doi = {10.1109/JQE.2016.2518081}, pages = {2400207}, language = {en} } @inproceedings{JaegerBarthHammerschmidtetal., author = {J{\"a}ger, Klaus and Barth, Carlo and Hammerschmidt, Martin and Herrmann, Sven and Burger, Sven and Schmidt, Frank and Becker, Christiane}, title = {Sinusoidal Nanotextures for Coupling Light into c-Si Thin-Film Solar Cells}, series = {Light, Energy and the Environement 2015}, booktitle = {Light, Energy and the Environement 2015}, doi = {10.1364/PV.2015.PTu4B.3}, pages = {PTu4B.3}, language = {en} } @inproceedings{BarthJaegerBurgeretal., author = {Barth, Carlo and J{\"a}ger, Klaus and Burger, Sven and Hammerschmidt, Martin and Schmidt, Frank and Becker, Christiane}, title = {Design of Photonic Crystals with Near-Surface Field Enhancement}, series = {Light, Energy and the Environement 2015}, booktitle = {Light, Energy and the Environement 2015}, doi = {10.1364/PV.2015.JTu5A.9}, pages = {JTu5A.9}, language = {en} } @article{SontheimerPreidelLockauetal.2013, author = {Sontheimer, Tobias and Preidel, Veit and Lockau, Daniel and Back, Franziska and Rudigier-Voigt, Eveline and L{\"o}chel, Bernd and Erko, Alexei and Schmidt, Frank and Schnegg, Alexander and Lips, Klaus and Becker, Christiane and Rech, Bernd}, title = {Correlation between structural and opto-electronic characteristics of crystalline Si microhole arrays for photonic light management}, series = {Journal of Applied Physics}, volume = {114}, journal = {Journal of Applied Physics}, number = {17}, publisher = {AIP Publishing}, doi = {10.1063/1.4829008}, pages = {173513}, year = {2013}, language = {en} } @article{LockauSontheimerPreideletal., author = {Lockau, Daniel and Sontheimer, Tobias and Preidel, Veit and Ruske, Florian and Hammerschmidt, Martin and Becker, Christiane and Schmidt, Frank and Rech, Bernd}, title = {Advanced microhole arrays for light trapping in thin film silicon solar cells}, series = {Solar Energy Materials and Solar Cells}, volume = {125}, journal = {Solar Energy Materials and Solar Cells}, doi = {10.1016/j.solmat.2013.11.024}, pages = {298 -- 304}, language = {en} } @article{KirnerHammerschmidtSchwankeetal.2014, author = {Kirner, Simon and Hammerschmidt, Martin and Schwanke, Christoph and Lockau, Daniel and Calnan, Sonya and Frijnts, Tim and Neubert, Sebastian and Sch{\"o}pke, Andreas and Schmidt, Frank and Zollondz, Jens-Hendrik and Heidelberg, Andreas and Stannowski, Bernd and Rech, Bernd and Schlatmann, Rutger}, title = {Implications of TCO Topography on Intermediate Reflector Design for a-Si/μc-Si Tandem Solar Cells — Experiments and Rigorous Optical Simulations}, series = {IEEE Journal of Photovoltaics}, volume = {4}, journal = {IEEE Journal of Photovoltaics}, number = {1}, doi = {10.1109/JPHOTOV.2013.2279204}, pages = {10 -- 15}, year = {2014}, language = {en} } @inproceedings{HammerschmidtPomplunBurgeretal.2014, author = {Hammerschmidt, Martin and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {Adaptive sampling strategies for effcient parameter scans in nano-photonic device simulations}, series = {Proc. SPIE}, volume = {8980}, booktitle = {Proc. SPIE}, publisher = {SPIE}, doi = {10.1117/12.2036363}, pages = {89801O}, year = {2014}, language = {en} } @inproceedings{HammerschmidtLockauZschiedrichetal.2014, author = {Hammerschmidt, Martin and Lockau, Daniel and Zschiedrich, Lin and Schmidt, Frank}, title = {Optical modelling of incoherent substrate light-trapping in silicon thin film multi-junction solar cells with finite elements and domain decomposition}, series = {Proc. SPIE: Physics and Simulation of Optoelectronic Devices XXII}, volume = {8980}, booktitle = {Proc. SPIE: Physics and Simulation of Optoelectronic Devices XXII}, publisher = {SPIE}, doi = {10.1117/12.2036346}, pages = {898007}, year = {2014}, language = {en} } @inproceedings{WohlfeilBurgerStamatiadisetal., author = {Wohlfeil, Benjamin and Burger, Sven and Stamatiadis, Christos and Pomplun, Jan and Schmidt, Frank and Zimmermann, Lars and Petermann, Klaus}, title = {Numerical Simulation of Grating Couplers for Mode Multiplexed Systems}, series = {Proc. SPIE}, volume = {8988}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2044461}, pages = {89880K}, language = {en} } @inproceedings{ZschiedrichMaerzBurgeretal., author = {Zschiedrich, Lin and M{\"a}rz, Reinhard and Burger, Sven and Schmidt, Frank}, title = {Efficient 3D Finite Element Simulation of Fiber-Chip Coupling}, series = {Integrated Photonics Research and Applications/Nanophotonics}, booktitle = {Integrated Photonics Research and Applications/Nanophotonics}, doi = {10.1364/IPRA.2006.ITuF1}, pages = {ITuF1}, language = {en} } @incollection{PomplunZschiedrichKloseetal., author = {Pomplun, Jan and Zschiedrich, Lin and Klose, Roland and Schmidt, Frank and Burger, Sven}, title = {Finite Element Simulation of Radiation Losses in Photonic Crystal Fibers}, series = {Nanophotonic Materials: Photonic Crystals, Plasmonics, and Metamaterials}, booktitle = {Nanophotonic Materials: Photonic Crystals, Plasmonics, and Metamaterials}, publisher = {Wiley-VCH}, doi = {10.1002/9783527621880.ch17}, pages = {313 -- 331}, language = {en} } @inproceedings{WenzelCrumpEkhteraeietal., author = {Wenzel, Hans and Crump, Paul and Ekhteraei, Hossein and Schultz, Christoph M. and Pomplun, Jan and Burger, Sven and Zschiedrich, Lin and Schmidt, Frank and Erbert, G{\"o}tz}, title = {Theoretical and experimental analysis of the lateral modes of high-power broad-area lasers}, series = {Numerical Simulation of Optoelectronic Devices}, booktitle = {Numerical Simulation of Optoelectronic Devices}, doi = {10.1109/NUSOD.2011.6041183}, pages = {143 -- 144}, language = {en} } @article{ShchukinLedentsovJrKroppetal., author = {Shchukin, Vitaly and Ledentsov, Jr., Nikolay and Kropp, J{\"o}rg-R. and Steinle, Gunther and Ledentsov, Jr., Nikolay and Burger, Sven and Schmidt, Frank}, title = {Single-Mode Vertical Cavity Surface Emitting Laser via Oxide-Aperture-Engineering of Leakage of High Order Transverse Modes}, series = {IEEE J. Quant. Electron.}, volume = {50}, journal = {IEEE J. Quant. Electron.}, number = {12}, doi = {10.1109/JQE.2014.2364544}, pages = {990 -- 995}, language = {en} } @misc{HammerschmidtHerrmannPomplunetal., author = {Hammerschmidt, Martin and Herrmann, Sven and Pomplun, Jan and Zschiedrich, Lin and Burger, Sven and Schmidt, Frank}, title = {Reduced basis method for Maxwell's equations with resonance phenomena}, series = {Proc. SPIE}, volume = {9630}, journal = {Proc. SPIE}, issn = {1438-0064}, doi = {10.1117/12.2190425}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-55687}, pages = {96300R}, abstract = {Rigorous optical simulations of 3-dimensional nano-photonic structures are an important tool in the analysis and optimization of scattering properties of nano-photonic devices or parameter reconstruction. To construct geometrically accurate models of complex structured nano-photonic devices the finite element method (FEM) is ideally suited due to its flexibility in the geometrical modeling and superior convergence properties. Reduced order models such as the reduced basis method (RBM) allow to construct self-adaptive, error-controlled, very low dimensional approximations for input-output relationships which can be evaluated orders of magnitude faster than the full model. This is advantageous in applications requiring the solution of Maxwell's equations for multiple parameters or a single parameter but in real time. We present a reduced basis method for 3D Maxwell's equations based on the finite element method which allows variations of geometric as well as material and frequency parameters. We demonstrate accuracy and efficiency of the method for a light scattering problem exhibiting a resonance in the electric field.}, language = {en} } @inproceedings{HiremathZschiedrichBurgeretal., author = {Hiremath, Kirankumar and Zschiedrich, Lin and Burger, Sven and Schmidt, Frank}, title = {Finite elements based numerical solution of nonlocal hydrodynamic Drude model of nano-plasmonic scatterers}, series = {12th International Conference on Fiber Optics and Photonics}, booktitle = {12th International Conference on Fiber Optics and Photonics}, doi = {10.1364/PHOTONICS.2014.M3D.4}, pages = {M3D.4}, language = {en} } @incollection{KantnerHoehneKopruckietal., author = {Kantner, Markus and H{\"o}hne, Theresa and Koprucki, Thomas and Burger, Sven and W{\"u}nsche, Hans-J{\"u}rgen and Schmidt, Frank and Mielke, Alexander and Bandelow, Uwe}, title = {Multi-dimensional modeling and simulation of semiconductor nanophotonic devices}, series = {Semiconductor Nanophotonics}, volume = {194}, booktitle = {Semiconductor Nanophotonics}, editor = {Kneissl, Michael and Knorr, Andreas and Reitzenstein, Stephan and Hoffmann, Axel}, publisher = {Springer}, address = {Cham}, doi = {10.1007/978-3-030-35656-9_7}, pages = {241 -- 283}, language = {en} } @inproceedings{BarthRoderBrodoceanuetal., author = {Barth, Carlo and Roder, Sebastian and Brodoceanu, Daniel and Kraus, Tobias and Burger, Sven and Hammerschmidt, Martin and Schmidt, Frank and Becker, Christiane}, title = {Increased fluorescence of PbS quantum dots on photonic crystal slab structures}, series = {Proc. Europ. Opt. Soc. Ann. Meet. 2016 (EOSAM)}, booktitle = {Proc. Europ. Opt. Soc. Ann. Meet. 2016 (EOSAM)}, isbn = {978-1-5108-4796-5}, pages = {181}, language = {en} } @inproceedings{HammerschmidtBarthBurgeretal., author = {Hammerschmidt, Martin and Barth, Carlo and Burger, Sven and Becker, Christiane and Schmidt, Frank}, title = {Determining 2D photonic crystal geometries from reflectance spectra with a reduced basis method}, series = {Proc. Europ. Opt. Soc. Ann. Meet. 2016 (EOSAM)}, booktitle = {Proc. Europ. Opt. Soc. Ann. Meet. 2016 (EOSAM)}, isbn = {978-1-5108-4796-5}, pages = {281}, language = {en} } @book{AbbinkBaermannBešinovicetal., author = {Abbink, Erwin and B{\"a}rmann, Andreas and Bešinovic, Nikola and Bohlin, Markus and Cacchiani, Valentina and Caimi, Gabrio and de Fabris, Stefano and Dollevoet, Twan and Fischer, Frank and F{\"u}genschuh, Armin and Galli, Laura and Goverde, Rob M.P. and Hansmann, Ronny and Homfeld, Henning and Huisman, Dennis and Johann, Marc and Klug, Torsten and T{\"o}rnquist Krasemann, Johanna and Kroon, Leo and Lamorgese, Leonardo and Liers, Frauke and Mannino, Carlo and Medeossi, Giorgio and Pacciarelli, Dario and Reuther, Markus and Schlechte, Thomas and Schmidt, Marie and Sch{\"o}bel, Anita and Sch{\"u}lldorf, Hanno and Stieber, Anke and Stiller, Sebastian and Toth, Paolo and Zimmermann, Uwe}, title = {Handbook of Optimization in the Railway Industry}, volume = {268}, editor = {Bornd{\"o}rfer, Ralf and Klug, Torsten and Lamorgese, Leonardo and Mannino, Carlo and Reuther, Markus and Schlechte, Thomas}, publisher = {Springer Verlag}, isbn = {978-3-319-72152-1}, doi = {10.1007/978-3-319-72153-8}, abstract = {This book promotes the use of mathematical optimization and operations research methods in rail transportation. The editors assembled thirteen contributions from leading scholars to present a unified voice, standardize terminology, and assess the state-of-the-art. There are three main clusters of articles, corresponding to the classical stages of the planning process: strategic, tactical, and operational. These three clusters are further subdivided into five parts which correspond to the main phases of the railway network planning process: network assessment, capacity planning, timetabling, resource planning, and operational planning. Individual chapters cover: Simulation Capacity Assessment Network Design Train Routing Robust Timetabling Event Scheduling Track Allocation Blocking Shunting Rolling Stock Crew Scheduling Dispatching Delay Propagation}, language = {en} } @inproceedings{ZschiedrichSchmidtPomplunetal., author = {Zschiedrich, Lin and Schmidt, Frank and Pomplun, Jan and Burger, Sven}, title = {Finite elements for nano-optics applications}, series = {Proc. Europ. Opt. Soc. Ann. Meet. 2016 (EOSAM)}, booktitle = {Proc. Europ. Opt. Soc. Ann. Meet. 2016 (EOSAM)}, isbn = {978-1-5108-4796-5}, pages = {178}, language = {en} } @misc{HammerschmidtHerrmannPomplunetal., author = {Hammerschmidt, Martin and Herrmann, Sven and Pomplun, Jan and Burger, Sven and Schmidt, Frank}, title = {Model order reduction for the time-harmonic Maxwell equation applied to complex nanostructures}, series = {Proc. SPIE}, volume = {9742}, journal = {Proc. SPIE}, issn = {1438-0064}, doi = {10.1117/12.2212367}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-57239}, pages = {97420M}, abstract = {Fields such as optical metrology and computational lithography require fast and efficient methods for solving the time-harmonic Maxwell's equation. Highly accurate geometrical modeling and numerical accuracy atcomputational costs are a prerequisite for any simulation study of complex nano-structured photonic devices. We present a reduced basis method (RBM) for the time-harmonic electromagnetic scattering problem based on the hp-adaptive finite element solver JCMsuite capable of handling geometric and non-geometric parameter dependencies allowing for online evaluations in milliseconds. We apply the RBM to compute light-scatteringoptical wavelengths off periodic arrays of fin field-effect transistors (FinFETs) where geometrical properties such as the width and height of the fin and gate can vary in a large range.}, language = {en} } @misc{HammerschmidtBarthPomplunetal., author = {Hammerschmidt, Martin and Barth, Carlo and Pomplun, Jan and Burger, Sven and Becker, Christiane and Schmidt, Frank}, title = {Reconstruction of photonic crystal geometries using a reduced basis method for nonlinear outputs}, issn = {1438-0064}, doi = {10.1117/12.2212482}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-57249}, abstract = {Maxwell solvers based on the hp-adaptive finite element method allow for accurate geometrical modeling and high numerical accuracy. These features are indispensable for the optimization of optical properties or reconstruction of parameters through inverse processes. High computational complexity prohibits the evaluation of the solution for many parameters. We present a reduced basis method (RBM) for the time-harmonic electromagnetic scattering problem allowing to compute solutions for a parameter configuration orders of magnitude faster. The RBM allows to evaluate linear and nonlinear outputs of interest like Fourier transform or the enhancement of the electromagnetic field in milliseconds. We apply the RBM to compute light-scattering off two dimensional photonic crystal structures made of silicon and reconstruct geometrical parameters.}, language = {en} } @misc{HammerschmidtHerrmannBurgeretal., author = {Hammerschmidt, Martin and Herrmann, Sven and Burger, Sven and Pomplun, Jan and Schmidt, Frank}, title = {Reduced basis method for the optimization of nano-photonic devices}, issn = {1438-0064}, doi = {10.1007/s11082-016-0530-1}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-57556}, abstract = {Optical 3D simulations in many-query and real-time contexts require new solution strategies. We study an adaptive, error controlled reduced basis method for solving parametrized time-harmonic optical scattering problems. Application fields are, among others, design and optimization problems of nano-optical devices as well as inverse problems for parameter reconstructions occuring e. g. in optical metrology. The reduced basis method presented here relies on a finite element modeling of the scattering problem with parametrization of materials, geometries and sources.}, language = {en} } @article{LangHelfmeierStefanowskietal., author = {Lang, Annemarie and Helfmeier, Sarah and Stefanowski, Jonathan and Kuppe, Aditi and Sunkara, Vikram and Pfeiffenberger, Moritz and Wolter, Angelique and Damerau, Alexandra and Hemmati-Sadeghi, Shabnam and Ringe, Jochen and Haag, Rainer and Hauser, Anja E. and L{\"o}hning, Max and Perka, Carsten and Duda, Georg and Hoff, Paula and Schmidt-Bleek, Katharina and Gaber, Timo and Buttgereit, Frank}, title = {HIF-stabilization prevents delayed fracture healing}, series = {bioarxiv}, journal = {bioarxiv}, doi = {10.1101/2020.07.02.182832}, language = {en} } @article{SchemberaWuebbelingKopruckietal., author = {Schembera, Bj{\"o}rn and W{\"u}bbeling, Frank and Koprucki, Thomas and Biedinger, Christine and Reidelbach, Marco and Schmidt, Burkhard and G{\"o}ddeke, Dominik and Fiedler, Jochen}, title = {Building Ontologies and Knowledge Graphs for Mathematics and its Applications}, series = {Proceedings of the Conference on Research Data Infrastructure}, volume = {1}, journal = {Proceedings of the Conference on Research Data Infrastructure}, publisher = {TIB Open Publishing}, issn = {2941-296X}, doi = {10.52825/cordi.v1i.255}, abstract = {Ontologies and knowledge graphs for mathematical algorithms and models are presented, that have been developed by the Mathematical Research Data Initiative. This enables FAIR data handling in mathematics and the applied disciplines. Moreover, challenges of harmonization during the ontology development are discussed.}, language = {en} } @inproceedings{SchemberaWuebbelingKleikampetal., author = {Schembera, Bj{\"o}rn and W{\"u}bbeling, Frank and Kleikamp, Hendrik and Biedinger, Christine and Fiedler, Jochen and Reidelbach, Marco and Shehu, Aurela and Schmidt, Burkhard and Koprucki, Thomas and Iglezakis, Dotothea and G{\"o}ddeke, Dominik}, title = {Ontologies for Models and Algorithms in Applied Mathematics and Related Disciplines}, abstract = {In applied mathematics and related disciplines, the modeling-simulation-optimization workflow is a prominent scheme, with mathematical models and numerical algorithms playing a crucial role. For these types of mathematical research data, the Mathematical Research Data Initiative has developed, merged and implemented ontologies and knowledge graphs. This contributes to making mathematical research data FAIR by introducing semantic technology and documenting the mathematical foundations accordingly. Using the concrete example of microfracture analysis of porous media, it is shown how the knowledge of the underlying mathematical model and the corresponding numerical algorithms for its solution can be represented by the ontologies.}, language = {en} }