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Q: Fachverband Quantenoptik und Photonik
Q 31: Photonics I
Q 31.2: Vortrag
Mittwoch, 16. März 2022, 10:45–11:00, Q-H15
Role of order and disorder for 2D photonic structures modelled using FDTD simulations — •David Röhlig1, Eduard Kuhn1, Thomas Blaudeck2, and Angela Thränhardt1 — 1TU Chemnitz, Institut für Physik, Reichenhainer Str. 70, 09126 Chemnitz — 2TU Chemnitz, Forschungszentrum MAIN, Rosenbergstraße 6, 09126 Chemnitz
Investigations of real photonic systems have so far mostly neglected fabrication imperfections and aspects of disorder [1]. Nevertheless, they always play a decisive role for function [2]: deviations from ideal crystallinity occur both in nature and artificial systems. Although in nanotechnologies the accuracy of manufacturing processes has increased, irregularities still play a role for the performance of photonic components [3]. The extent to which disorder affects photonic systems depends on the type of disorder related to various geometrical and material quantities. Using FDTD, we simulated transmission spectra of 2D optical systems introducing a controlled amount of disorder of various types. We found that increasing disorder always leads to a transmission decrease and particular spectral changes. The results were compared with spectra of amorphous photonic crystals, generated by a molecular dynamics algorithm.
[1] M. Rothammer et al. Advanced Optical Materials 9, 19, 2100787 (2021). DOI 10.1002/adom.202100787. [2] E. Kuhn, D. Röhlig et al. Nano Select 2, 12, 2461-2472 (2021). DOI 10.1002/nano.202100263. [3] D. Segura et al. Sensors and Actuators A: Physical 264, 172-179 (2017). DOI 10.1016/j.sna.2017.07.011.