@inproceedings{LassilaShpakVaiguetal.2016, author = {Lassila, Antti and Shpak, Maksim and Vaigu, A. and Smid, M. and Velasco, A. and Pokatilov, A. and Fatadin, I. and Ferguson, R. and Robinson, D. and Walbaum, T. and Burger, Sven and Haapalainen, Mertsi and Vahimaa, P. and Lukner, H. and Pernice, W. and Pitwon, R. and Deninger, A. and Morel, Jacques and Castagna, Natascia and Peters, O. and Husu, H.}, title = {Joint research for photonics fibres, waveguides and interconnects}, booktitle = {Proc. Europ. Opt. Soc. Ann. Meet. 2016 (EOSAM)}, isbn = {978-1-5108-4796-5}, pages = {25}, year = {2016}, language = {en} } @incollection{ManleyBurgerSchmidtetal.2015, author = {Manley, Phillip and Burger, Sven and Schmidt, Frank and Schmid, Martina}, title = {Design Principles for Plasmonic Nanoparticle Devices}, 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}, arxiv = {http://arxiv.org/abs/1403.7919}, doi = {10.1007/978-3-319-12217-5_13}, pages = {223 -- 247}, year = {2015}, language = {en} } @article{GutscheMaeusleBurger2016, author = {Gutsche, Philipp and M{\"a}usle, Raquel and Burger, Sven}, title = {Locally Enhanced and Tunable Optical Chirality in Helical Metamaterials}, volume = {3}, journal = {Photonics}, arxiv = {http://arxiv.org/abs/1611.07748}, doi = {10.3390/photonics3040060}, pages = {60}, year = {2016}, language = {en} } @inproceedings{GutscheMaeusleBurger2016, author = {Gutsche, Philipp and M{\"a}usle, Raquel and Burger, Sven}, title = {Tailoring local optical chirality in helical metamaterials}, booktitle = {2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics}, doi = {10.1109/MetaMaterials.2016.7746440}, pages = {73 -- 75}, year = {2016}, language = {en} } @inproceedings{JaegerHammerschmidtKoeppeletal.2016, author = {J{\"a}ger, Klaus and Hammerschmidt, Martin and K{\"o}ppel, Grit and Burger, Sven and Becker, Christiane}, title = {On Accurate Simulations of Thin-Film Solar Cells With a Thick Glass Superstrate}, booktitle = {Light, Energy and the Environment 2016}, doi = {10.1364/PV.2016.PM3B.5}, pages = {PM3B.5}, year = {2016}, language = {en} } @inproceedings{GutscheMaeusleBurger2016, author = {Gutsche, Philipp and M{\"a}usle, Raquel and Burger, Sven}, title = {Circular polarization phenomena in chiral nano-optical devices}, booktitle = {Light, Energy and the Environment 2016}, doi = {10.1364/FTS.2016.JW4A.4}, pages = {JW4A.4}, year = {2016}, language = {en} } @article{BarthBurgerBecker2016, author = {Barth, Carlo and Burger, Sven and Becker, Christiane}, title = {Symmetry-Dependency of Anticrossing Phenomena in Slab-Type Photonic Crystals}, volume = {24}, journal = {Opt. Express}, doi = {10.1364/OE.24.010931}, pages = {10931}, year = {2016}, language = {en} } @article{BarthProbstHerrmannetal.2016, author = {Barth, Carlo and Probst, J{\"u}rgen and Herrmann, Sven and Hammerschmidt, Martin and Becker, Christiane}, title = {Numerical characterization of symmetry properties for photonic crystals with hexagonal lattice}, volume = {9885}, journal = {Proc. SPIE}, doi = {10.1117/12.2227094}, pages = {988506}, year = {2016}, abstract = {We present a numerical method to characterize the symmetry properties of photonic crystal (PhC) modes based on field distributions, which themselves can be obtained numerically. These properties can be used to forecast specific features of the optical response of such systems, e.g. which modes are allowed to couple to external radiation fields. We use 2D PhCs with a hexagonal lattice of holes in dielectric as an example and apply our technique to reproduce results from analytical considerations. Further, the method is extended to fully vectorial problems in view of 3D PhCs and PhC slabs, its functionality is demonstrated using test cases and, finally, we provide an efficient implementation. The technique can thus readily be applied to output data of all band structure computation methods or even be embedded - gaining additional information about the mode symmetry.}, language = {en} } @article{JaegerKoeppelBarthetal.2016, 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}, volume = {9898}, journal = {Proc. SPIE}, doi = {10.1117/12.2225459}, pages = {989808}, year = {2016}, language = {en} } @article{SoltwischHaaseWerneckeetal.2016, author = {Soltwisch, Victor and Haase, Anton and Wernecke, Jan and Probst, J{\"u}rgen and Schoengen, Max and Burger, Sven and Krumrey, Michael and Scholze, Frank}, title = {Correlated diffuse x-ray scattering from periodically nanostructured surfaces}, volume = {94}, journal = {Phys. Rev. B}, arxiv = {http://arxiv.org/abs/1509.02003}, doi = {10.1103/PhysRevB.94.035419}, pages = {035419}, year = {2016}, language = {en} } @phdthesis{Hammerschmidt2016, author = {Hammerschmidt, Martin}, title = {Optical simulation of complex nanostructured solar cells with a reduced basis method}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:188-fudissthesis000000102429-1}, pages = {XX, 169}, year = {2016}, abstract = {Simulations of optical processes and complex nanostructured devices have become omnipresent in recent years in several fields of current research and industrial applications, not limited to the field of photovoltaics. Devices or processes are optimized with respect to a certain objective where the underlying physical processes are described by partial differential equations. In photovoltaics and photonics electromagnetic fields are investigated which are governed by Maxwell's equations. In this thesis a reduced basis method for the solution of the parameter dependent electromagnetic scattering problem with arbitrary parameters is developed. The method is developed with the specific challenges arising in optical simulations of thin-film silicon solar cells in mind. These are large in domain size and have a complex three-dimensional structure, making optimization tasks infeasible if high-accuracy of the electromagnetic field solution is required. The application of the empirical interpolation methods allows to expand an arbitrary parameter dependence affinely. Thus not only geometries, but also material tensors and source fields can be parameterized. Additionally, the required non-linear post-processing steps of the electromagnetic field to derive energy fluxes or volume absorption are addressed. The reduced basis method allows to reduce the computational costs by orders of magnitude compared to efficient finite element solvers. In addition, an efficient tailored domain decomposition algorithm is presented to model incoherent layers or illuminations in optical systems efficiently. This is of particular interest for solar cells in superstrate configuration where the absorber is illuminated through a glass substrate. The developed methods are employed in application examples taken from collaborations with experimentalists active in the joint lab "BerOSE" (Berlin Joint Lab for Optical Simulations for Energy Research). The optical model of a thin-film silicon multi-junction with incoherent light-trapping is characterized in great detail. The computational gains through hybrid, hp adaptive finite elements are studied and the incoherent domain decomposition algorithm is applied to model a more realistic light-trapping by the glass substrate. The numerical examples of a hexagonal nano-hole array and multi-junction silicon solar cell with a tunable intermediate reflector layer show that the reduced basis method is well suited as a forward solver for modeling and optimization tasks arising in photovoltaics and photonics. Reduced models for illumination and geometric parameters are built providing up to five orders of magnitude savings in computational costs. Resonance phenomena present in the nano-hole array example are detected and the model adapts itself automatically.}, language = {en} } @article{HammerschmidtDoepkingBurgeretal.2020, author = {Hammerschmidt, Martin and D{\"o}pking, Sandra and Burger, Sven and Matera, Sebastian}, title = {Field Heterogeneities and Their Impact on Photocatalysis: Combining Optical and Kinetic Monte Carlo Simulations on the Nanoscale}, volume = {124}, journal = {J. Phys. Chem. C}, doi = {10.1021/acs.jpcc.9b11469}, pages = {3177}, year = {2020}, language = {en} } @misc{GutscheNietoVesperinasMaeusleetal.2017, author = {Gutsche, Philipp and Nieto-Vesperinas, Manuel and M{\"a}usle, Raquel and Burger, Sven}, title = {Chiral Nanophotonics: Theory and Simulation}, journal = {Doctoral Summer School on Nanophotonics and Metamaterials, ITMO University}, year = {2017}, abstract = {The interaction of light and chiral matter is subject of recent research both in fundamental science and applications. Among these are the helicity of electromagnetic fields described with the optical chirality density and emitters sensitive to circular polarization employed in quantum communications. In the weak coupling regime of chiral emitters, we analyze the conversion of chirality which can be regarded as an analogue to absorption of energy describing the change of circular polarization of the incident field. This enables the tailoring of chiral near-fields close to metamaterials, e.g. composed of gold helices, and gives insights into extinction measurements such as circular dichroism. We show relation of the weak and strong coupling regime. The latter can be modelled with cross electric-magnetic polarizabilities or with effective chiral materials, i.e. bi-anisotropic media. Accordingly, we motivate the necessity for rigorous numerical simulations to accurately describe chiral light-matter interaction.}, language = {en} } @article{ChenManleyTockhornetal.2018, author = {Chen, Duote and Manley, Phillip and Tockhorn, Philipp and Eisenhauer, David and K{\"o}ppel, Grit and Hammerschmidt, Martin and Burger, Sven and Albrecht, Steve and Becker, Christiane and J{\"a}ger, Klaus}, title = {Nanophotonic Light Management for Perovskite-Silicon Tandem Solar Cells}, volume = {8}, journal = {J. Photonics Energy}, arxiv = {http://arxiv.org/abs/1801.07252}, doi = {10.1117/1.JPE.8.022601}, pages = {022601}, year = {2018}, language = {en} } @article{McPeakvanEngersBianchietal.2015, author = {McPeak, Kevin and van Engers, Christian D. and Bianchi, Sarah and Rossinelli, Aurelio and Poulikakos, Lisa and Bernard, Laetitia and Herrmann, Sven and Kim, David K. and Burger, Sven and Blome, Mark and Jayanti, Sriharsha V. and Norris, David}, title = {Ultraviolet Plasmonic Chirality from Colloidal Aluminum Nanoparticles Exhibiting Charge-Selective Protein Detection}, volume = {27}, journal = {Adv. Mater.}, doi = {10.1002/adma.201503493}, pages = {6244}, year = {2015}, language = {en} } @inproceedings{BurgerGutscheHammerschmidtetal.2015, 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}, volume = {9630}, booktitle = {Proc. SPIE}, arxiv = {http://arxiv.org/abs/1510.02607}, doi = {10.1117/12.2190119}, pages = {96300S}, year = {2015}, language = {en} } @misc{HammerschmidtHerrmannPomplunetal.2015, 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}, 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}, year = {2015}, 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} } @misc{GelssMateraSchuette2015, author = {Gelß, Patrick and Matera, Sebastian and Sch{\"u}tte, Christof}, title = {Solving the master equation without kinetic Monte Carlo: tensor train approximations for a CO oxidation model}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-55743}, year = {2015}, abstract = {In multiscale models of heterogeneous catalysis, one crucial point is the solution of a Markovian master equation describing the stochastic reaction kinetics. This usually is too high-dimensional to be solved with standard numerical techniques and one has to rely on sampling approaches based on the kinetic Monte Carlo method. In this study we break the curse of dimensionality for the direct solution of the Markovian master equation by exploiting the Tensor Train Format for this purpose. The performance of the approach is demonstrated on a first principles based, reduced model for the CO oxidation on the RuO_2(110) surface. We investigate the complexity for increasing system size and for various reaction conditions. The advantage over the stochastic simulation approach is illustrated by a problem with increased stiffness.}, language = {en} } @inproceedings{AgcosBodermannBurgeretal.2015, author = {Agcos, Emil and Bodermann, Bernd and Burger, Sven and Dai, Gaoliang and Endres, Johannes and Hansen, Poul-Erik and Nielson, Lars and Madsen, Morten and Heidenreich, Sebastian and Krumrey, Michael and Loechel, Bernd and Probst, J{\"u}rgen and Scholze, Frank and Soltwisch, Victor and Wurm, Matthias}, title = {Scatterometry reference standards to improve tool matching and traceability in lithographical nanomanufacturing}, volume = {9556}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2190409}, pages = {955610}, year = {2015}, language = {en} } @article{BeckerWyssEisenhaueretal.2014, author = {Becker, Christiane and Wyss, Philippe and Eisenhauer, David and Probst, J{\"u}rgen and Preidel, Veit and Hammerschmidt, Martin and Burger, Sven}, title = {5 x 5 cm2 silicon photonic crystal slabs on glass and plastic foil exhibiting broadband absorption and high-intensity near-fields}, volume = {4}, journal = {Sci. Rep.}, doi = {10.1038/srep05886}, pages = {5886}, year = {2014}, language = {en} } @article{KaschkeBlomeBurgeretal.2014, author = {Kaschke, Johannes and Blome, Mark and Burger, Sven and Wegener, Martin}, title = {Tapered N-helical metamaterials with three-fold rotational symmetry as improved circular polarizers}, volume = {22}, journal = {Opt. Expr.}, number = {17}, doi = {10.1364/OE.22.019936}, pages = {19936 -- 19946}, year = {2014}, language = {en} } @inproceedings{LedentsovJrKroppShchukinetal.2015, 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}, volume = {9381}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2082951}, pages = {93810F}, year = {2015}, language = {en} } @inproceedings{ShchukinLedentsovJrKroppetal.2015, 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}, volume = {9381}, booktitle = {Proc. SPIE}, doi = {10.1117/12.2077012}, pages = {93810V}, year = {2015}, language = {en} } @article{PetrikKumarFriedetal.2015, author = {Petrik, Peter and Kumar, Nitish and Fried, Miklos and Fodor, B{\´a}lint and Juh{\´a}sz, Gy{\"o}rgy and Pereira, Silvania and Burger, Sven and Urbach, H. Paul}, title = {Fourier ellipsometry - an ellipsometric approach to Fourier scatterometry}, volume = {10}, journal = {J. Eur. Opt. Soc.-Rapid}, doi = {10.2971/jeos.2015.15002}, pages = {15002}, year = {2015}, language = {en} } @inproceedings{WiesendangerBischoffJovanovetal.2014, author = {Wiesendanger, Samuel and Bischoff, Thomas and Jovanov, Vladislav and Knipp, Dietmar and Burger, Sven and Lederer, Falk and Rockstuhl, Carsten}, title = {Numerical investigations on the effects of film growth modes on light trapping in silicon thin film solar cells}, booktitle = {Light, Energy and the Environment}, publisher = {OSA}, doi = {10.1364/PV.2014.PF4C.4}, pages = {PF4C.4}, year = {2014}, language = {en} } @misc{HammerschmidtDoepkingBurgeretal.2017, author = {Hammerschmidt, Martin and D{\"o}pking, Sandra and Burger, Sven and Matera, Sebastian}, title = {Field Heterogeneities and their Impact on Photocatalysis: Combining optical and kinetic Monte Carlo Simulations on the Nanoscale}, issn = {1438-0064}, doi = {10.1021/acs.jpcc.9b11469}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-63690}, year = {2017}, abstract = {Gaining insights into the working principles of photocatalysts on an atomic scale is a challenging task. The obviously high complexity of the reaction mechanism involving photo-excited electrons and holes is one reason. Another complicating aspect is that the electromagnetic field, driving photocatalysis, is not homogeneous on a nanoscale level for particle based catalysts as it is influenced by the particle's shape and size. We present a simple model, inspired by the CO2 reduction on titania anatase, which addresses the impact of these heterogeneities on the photocatalytic kinetics by combining kinetic Monte Carlo with electromagnetic wave simulations. We find that average activity and especially efficiency might differ significantly between different particles. Moreover, we find sizable variation of the catalytic activity on a single facet of a nanocrystal. Besides this quantitative heterogeneity, the coverage situation in general changes laterally on this facet and we observe a concomitant change of the rate-determining steps. This heterogeneity on all levels of photocatalytic activity is masked in experimental studies, where only the spatially averaged activity can be addressed. Microkinetic models based on experimental findings might therefore not represent the true micro- scopic behavior, and mechanistic conclusion drawn from these need to be handled with care.}, language = {en} } @phdthesis{Manley2016, author = {Manley, Phillip}, title = {Simulation of Plasmonic Nanoparticles in Thin Film Solar Cells}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:188-fudissthesis000000102531-2}, year = {2016}, language = {en} } @article{WiesendangerBischoffJovanovetal.2014, author = {Wiesendanger, Samuel and Bischoff, Thomas and Jovanov, Vladislav and Knipp, Dietmar and Burger, Sven and Lederer, Falk and Rockstuhl, Carsten}, title = {Effects of film growth modes on light trapping in silicon thin film solar cells}, volume = {104}, journal = {Appl. Phys. Lett.}, number = {23}, doi = {10.1063/1.4882997}, pages = {231103}, year = {2014}, language = {en} } @article{MenzelHebestreitAlaeeetal.2014, author = {Menzel, Christoph and Hebestreit, Erik and Alaee, Rasoul and Albooyeh, Mohammad and M{\"u}hlig, Stefan and Burger, Sven and Rockstuhl, Carsten and Simovski, Constantin and Tretyakov, Sergei and Lederer, Falk and Pertsch, Thomas}, title = {Extreme Coupling: a route towards local magnetic metamaterials}, volume = {89}, journal = {Phys. Rev. B}, doi = {10.1103/PhysRevB.89.155125}, pages = {155125}, year = {2014}, language = {en} } @article{MenzelHebestreitMuehligetal.2014, author = {Menzel, Christoph and Hebestreit, Erik and M{\"u}hlig, Stefan and Rockstuhl, Carsten and Burger, Sven and Lederer, Falk and Pertsch, Thomas}, title = {The spectral shift between near- and far-field resonances of optical nano-antennas}, volume = {22}, journal = {Opt. Expr.}, number = {8}, doi = {10.1364/OE.22.009971}, pages = {9971 -- 9982}, year = {2014}, language = {en} } @article{McPeakvanEngersBlomeetal.2014, author = {McPeak, Kevin and van Engers, Christian D. and Blome, Mark and Park, Jong Hyuk and Burger, Sven and Gosalvez, Miguel A. and Faridi, Ava and Ries, Yasmina and Sahu, Ayaskanta and Norris, David}, title = {Complex Chiral Colloids and Surfaces via High-Index Off-Cut Silicon}, volume = {14}, journal = {Nano Lett.}, number = {5}, doi = {10.1021/nl501032j}, pages = {2934 -- 2940}, year = {2014}, language = {en} } @misc{HammerschmidtHerrmannBurgeretal.2016, 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}, year = {2016}, 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{PoulikakosGutscheMcPeaketal.2016, author = {Poulikakos, Lisa and Gutsche, Philipp and McPeak, Kevin and Burger, Sven and Niegemann, Jens and Hafner, Christian and Norris, David}, title = {The Optical Chirality Flux as a Useful Far-Field Probe of Chiral Near Fields}, volume = {3}, journal = {ACS Photonics}, arxiv = {http://arxiv.org/abs/1601.06716}, doi = {10.1021/acsphotonics.6b00201}, pages = {1619}, year = {2016}, language = {en} } @misc{HammerschmidtHerrmannPomplunetal.2016, 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}, 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}, year = {2016}, 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.2016, 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}, year = {2016}, 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} } @inproceedings{JaegerBarthHammerschmidtetal.2015, 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}, booktitle = {Light, Energy and the Environement 2015}, doi = {10.1364/PV.2015.PTu4B.3}, pages = {PTu4B.3}, year = {2015}, language = {en} } @inproceedings{BarthJaegerBurgeretal.2015, 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}, booktitle = {Light, Energy and the Environement 2015}, doi = {10.1364/PV.2015.JTu5A.9}, pages = {JTu5A.9}, year = {2015}, language = {en} } @article{JaegerBarthHammerschmidtetal.2016, 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}, volume = {24}, journal = {Opt. Express}, doi = {10.1364/OE.24.00A569}, pages = {A569}, year = {2016}, language = {en} } @article{HammerschmidtBarthPomplunetal.2016, 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}, volume = {9756}, journal = {Proc. SPIE}, doi = {10.1117/12.2212482}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-58187}, pages = {97561R}, year = {2016}, 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.2016, 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}, volume = {9742}, journal = {Proc. SPIE}, doi = {10.1117/12.2212367}, pages = {97420M}, year = {2016}, 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} } @article{HammerschmidtHerrmannPomplunetal.2016, 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}, volume = {48}, journal = {Optical and Quantum Electronics}, doi = {10.1007/s11082-016-0530-1}, pages = {250}, year = {2016}, 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{JaegerKoeppelHammerschmidtetal.2018, author = {J{\"a}ger, Klaus and K{\"o}ppel, Grit and Hammerschmidt, Martin and Burger, Sven and Becker, Christiane}, title = {On accurate simulations of thin-film solar cells with a thick glass superstrate}, volume = {26}, journal = {Opt. Express}, doi = {10.1364/OE.26.000A99}, pages = {A99}, year = {2018}, language = {en} }