Refine
Year of publication
Document Type
- Article (166)
- In Proceedings (146)
- Research data (13)
- Book chapter (9)
- ZIB-Report (8)
- Poster (7)
- Other (4)
- In Collection (1)
- Software (1)
Is part of the Bibliography
- no (355)
Keywords
Institute
- Numerical Mathematics (355) (remove)
Stand-alone quantum dot-based single-photon source operating at telecommunication wavelengths
(2020)
Model order reduction for the time-harmonic Maxwell equation applied to complex nanostructures
(2016)
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.
Reconstruction of photonic crystal geometries using a reduced basis method for nonlinear outputs
(2016)
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.
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.
We present a Newton-like method to solve inverse problems and to quantify parameter uncertainties. We apply the method to parameter reconstruction in optical scatterometry, where we take into account a priori information and measurement uncertainties using a Bayesian approach. Further, we discuss the influence of numerical accuracy on the reconstruction result.
Tripling the light extraction efficiency of a deep ultraviolet LED using a nanostructured p-contact
(2022)
Cover Picture: Resonance Expansion of Quadratic Quantities with Regularized Quasinormal Modes
(2023)
RPExpand (Version 2.0)
(2023)
RPExpand (Version 1)
(2023)
Source code and simulation results: Computing eigenfrequency sensitivities near exceptional points
(2024)
Optimized Sensing on Gold Nanoparticles Created by Graded-Layer Magnetron Sputtering and Annealing
(2024)
Chiral and directional optical emission from a dipole source coupled to a helical plasmonic antenna
(2024)
Modelling luminescent coupling in multi-junction solar cells: perovskite silicon tandem case study
(2024)