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Home Members Betz, Fridtjof

Betz, Fridtjof

Contact

Position
Staff
Room
2022
Phone
+49 30 84185-504
Email
Email
Division
Mathematics of Complex Systems
Department
Modeling and Simulation of Complex Processes
Group
Computational Nano Optics

Projects

Projects as Member

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MODAL-NanoLab

The NanoLab project is part of the MODAL research campus. Data-based methods play an essential role in the development and application of photonic technologies. Efficient...

MODAL-NanoLab
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Emitter Resonator Interaction (ECMath OT9)

This project investigates methods to model and simulate nanoscale light emitters in complex environments. Semiconductor quantum dots can be used as light sources in...

Emitter Resonator Interaction (ECMath OT9)

Publications

2025
A framework to compute resonances arising from multiple scattering Adv. Theory Simul., Vol.8, p. 2400989, 2025 Jan David Fischbach, Fridtjof Betz, Nigar Asadova, Pietro Tassan, Darius Urbonas, Thilo Stöferle, Rainer F. Mahrt, Sven Burger, Carsten Rockstuhl, Felix Binkowski, Thomas Jebb Sturges BibTeX
DOI
arXiv
Resonance modes in microstructured photonic waveguides: Efficient and accurate computation based on AAA rational approximation Nanophotonics, Vol.14, p. 1665, 2025 Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
arXiv
Source code and simulation results: Hidden resonances in non-Hermitian systems with scattering thresholds Zenodo, p. doi: 10.5281/zenodo.14651612, 2025 Fridtjof Betz, Felix Binkowski, Jan David Fischbach, Nick Feldman, Carsten Rockstuhl, A. Femius Koenderink, Sven Burger BibTeX
DOI
Uncovering hidden resonances in non-Hermitian systems with scattering thresholds Laser Photonics Rev., 2025 (epub ahead of print) Fridtjof Betz, Felix Binkowski, Jan David Fischbach, Nick Feldman, Lin Zschiedrich, Carsten Rockstuhl, A. Femius Koenderink, Sven Burger BibTeX
arXiv
DOI
2024
Computing eigenfrequency sensitivities near exceptional points Phys. Rev. Research, Vol.6, p. 023148, 2024 Felix Binkowski, Julius Kullig, Fridtjof Betz, Lin Zschiedrich, Andrea Walther, Jan Wiersig, Sven Burger BibTeX
DOI
arXiv
Efficient Rational Approximation of Optical Response Functions with the AAA Algorithm (Laser Photonics Rev. 18(11)/2024) Laser Photonics Rev., Vol.18, p. 2470071, 2024 Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger, Felix Binkowski BibTeX
DOI
Efficient rational approximation of optical response functions with the AAA algorithm Laser Photonics Rev., Vol.18, p. 2400584, 2024 Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger, Felix Binkowski BibTeX
arXiv
DOI
Inside Front Cover: Numerical Investigation of a Coupled Micropillar - Waveguide System for Integrated Quantum Photonic Circuits (Adv. Quantum Technol. 12/2024) Adv. Quantum Technol., Vol.7, p. 2470036, 2024 Léo J. Roche, Fridtjof Betz, Yuhui Yang, Imad Limame, Ching-Wen Shih, Sven Burger, Stephan Reitzenstein BibTeX
DOI
Numerical Investigation of a Coupled Micropillar - Waveguide System for Integrated Quantum Photonic Circuits Adv. Quantum Technol., Vol.7, p. 2400195, 2024 Léo J. Roche, Fridtjof Betz, Yuhui Yang, Imad Limame, Ching-Wen Shih, Sven Burger, Stephan Reitzenstein BibTeX
DOI
Poles and Zeros in Resonant Nano-Photonic Systems 2024 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2024 Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
Poles and zeros in non-Hermitian systems: Application to photonics Phys. Rev. B, Vol.109, p. 045414, 2024 Felix Binkowski, Fridtjof Betz, Remi Colom, Patrice Genevet, Sven Burger BibTeX
DOI
arXiv
Source code and simulation results: Computing eigenfrequency sensitivities near exceptional points Zenodo, p. doi: 10.5281/zenodo.10715639, 2024 Felix Binkowski, Julius Kullig, Fridtjof Betz, Lin Zschiedrich, Andrea Walther, Jan Wiersig, Sven Burger BibTeX
DOI
Source code and simulation results: Efficient rational approximation of optical response functions with the AAA algorithm Zenodo, p. doi: 10.5281/zenodo.10853692, 2024 Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger, Felix Binkowski BibTeX
DOI
Source code and simulation results: Resonance modes in microstructured photonic waveguides - Efficient and accurate computation based on AAA rational approximation Zenodo, p. doi: 10.5281/zenodo.14202408, 2024 Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
Version 2 — RPExpand: Software for Riesz projection expansion of resonance phenomena SoftwareX, Vol.26, p. 101694, 2024 Fridtjof Betz, Felix Binkowski, Lilli Kuen, Sven Burger BibTeX
DOI
2023
Applying a Riesz-projection-based contour integral eigenvalue solver to compute resonance modes of a VCSEL Proc. SPIE, p. 125750J, Vol.12575, 2023 Lilli Kuen, Fridtjof Betz, Felix Binkowski, Philipp-Immanuel Schneider, Martin Hammerschmidt, Niels Heermeier, Sven Rodt, Stephan Reitzenstein, Sven Burger BibTeX
DOI
arXiv
Cover Picture: Resonance Expansion of Quadratic Quantities with Regularized Quasinormal Modes Phys. Status Solidi A, Vol.220, p. 2370013, 2023 Fridtjof Betz, Felix Binkowski, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
High-performance designs for fiber-pigtailed quantum-light sources based on quantum dots in electrically-controlled circular Bragg gratings Opt. Express, Vol.31, p. 14750, 2023 Lucas Rickert, Fridtjof Betz, Matthias Plock, Sven Burger, Tobias Heindel BibTeX
DOI
arXiv
RPExpand (Version 1) Zenodo, p. doi: 10.5281/zenodo.7840116, 2023 Fridtjof Betz, Felix Binkowski, Sven Burger BibTeX
DOI
RPExpand (Version 2.0) Zenodo, p. doi: 10.5281/zenodo.10371002, 2023 Fridtjof Betz, Felix Binkowski, Sven Burger, Lilli Kuen BibTeX
DOI
Resonance expansion of quadratic quantities with regularized quasinormal modes Phys. Status Solidi A, Vol.220, p. 2200892, 2023 Fridtjof Betz, Felix Binkowski, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
arXiv
Source code and simulation results: Poles and zeros of electromagnetic quantities in photonic systems Zenodo, p. 8063931, 2023 Felix Binkowski, Fridtjof Betz, Remi Colom, Patrice Genevet, Sven Burger BibTeX
DOI
2022
Computation of eigenfrequency sensitivities using Riesz projections for efficient optimization of nanophotonic resonators Commun. Phys., Vol.5, p. 202, 2022 Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Philipp-Immanuel Schneider, Lin Zschiedrich, Sven Burger BibTeX
DOI
arXiv
Data publication for "High-performance designs for fiber-pigtailed quantum-light sources based on quantum dots in electrically-controlled circular Bragg gratings" Zenodo, p. 7360516, 2022 Lucas Rickert, Fridtjof Betz, Matthias Plock, Sven Burger, Tobias Heindel BibTeX
DOI
Enhanced Purcell factor for nanoantennas supporting interfering resonances Phys. Rev. Research, Vol.4, p. 023189, 2022 Remi Colom, Felix Binkowski, Fridtjof Betz, Yuri Kivshar, Sven Burger BibTeX
DOI
arXiv
Numerical methods for the investigation of resonances in nanophotonics The 12th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2022), S. Zouhdi (Ed.), p. 247, 2022 Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Philipp-Immanuel Schneider, Lin Zschiedrich, Sven Burger BibTeX
Optical and Spin Properties of NV Center Ensembles in Diamond Nano-Pillars Nanomaterials, Vol.12, p. 1516, 2022 Kseniia Volkova, Julia Heupel, Sergei Trofimov, Fridtjof Betz, Rémi Colom, Rowan W. MacQueen, Sapida Akhundzada, Meike Reginka, Arno Ehresmann, Johann Peter Reithmeier, Sven Burger, Cyril Popov, Boris Naydenov BibTeX
DOI
Scripts for quantifying the effect of diamond nano-pillars on the fluorescence of NV centers Zenodo, 2022 Fridtjof Betz, Remi Colom, Sven Burger, Boris Naydenov BibTeX
DOI
Source code and simulation data for Computation of eigenfrequency sensitivities using Riesz projections for efficient optimization of nanophotonic resonators Zenodo, 2022 Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Philipp-Immanuel Schneider, Lin Zschiedrich, Sven Burger BibTeX
DOI
Source code and simulation results for computing resonance expansions of quadratic quantities with regularized quasinormal modes Zenodo, 2022 Fridtjof Betz, Felix Binkowski, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
Source code and simulation results for nanoantennas supporting an enhanced Purcell factor due to interfering resonances Zenodo, 2022 Remi Colom, Felix Binkowski, Fridtjof Betz, Yuri Kivshar, Sven Burger BibTeX
DOI
2021
Contour integral methods for resonance phenomena in nano-optics The 11th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2021), S. Zouhdi, D. Pawlak, A. Kudelski (Eds.), p. 523, 2021 Felix Binkowski, Fridtjof Betz, Remi Colom, Martin Hammerschmidt, Philipp-Immanuel Schneider, Lin Zschiedrich, Sven Burger BibTeX
RPExpand: Software for Riesz projection expansion of resonance phenomena SoftwareX, Vol.15, p. 100763, 2021 Fridtjof Betz, Felix Binkowski, Sven Burger BibTeX
DOI
RPExpand: Software for Riesz projection expansion of resonance phenomena [Source Code] 2021 Fridtjof Betz, Felix Binkowski, Sven Burger BibTeX
DOI
2020
Investigation and application of contour integral methods for resonance expansion in nanophotonics Master's thesis, Freie Universität Berlin, Sven Burger, Ana-Nicoleta Bondar (Advisors), 2020 Fridtjof Betz BibTeX
Modal expansion of optical far-field quantities using quasinormal modes EPJ Web Conf., p. 05007, Vol.238, 2020 Felix Binkowski, Fridtjof Betz, Rémi Colom, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
Quasi-normal mode expansion as a tool for the design of nanophotonic devices EPJ Web Conf., p. 05008, Vol.238, 2020 Rémi Colom, Felix Binkowski, Fridtjof Betz, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
DOI
Quasinormal mode expansion of optical far-field quantities Phys. Rev. B, Vol.102, p. 035432, 2020 Felix Binkowski, Fridtjof Betz, Rémi Colom, Martin Hammerschmidt, Lin Zschiedrich, Sven Burger BibTeX
arXiv
DOI
2019
Spectral Expansion of the Scattering Response of Resonant Nanostructures EOS Topical Meeting on Diffractive Optics, Kimmo Saastamoinen (Ed.), p. 1, 2019, ISBN: 978-952-68553-8-7 Felix Binkowski, Lin Zschiedrich, Philipp-Immanuel Schneider, Martin Hammerschmidt, Xavier Garcia Santiago, Fridtjof Betz, Sven Burger BibTeX