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Simulation of light scattering in large, disordered nanostructures using a periodic T-matrix method

Theobald, Dominik 1; Beutel, Dominik ORCID iD icon 2; Borgmann, Luisa ORCID iD icon 3; Mescher, Henning 1,3; Gomard, Guillaume 1,3; Rockstuhl, Carsten 2; Lemmer, Uli 1,3
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)
2 Institut für Theoretische Festkörperphysik (TFP), Karlsruher Institut für Technologie (KIT)
3 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)

Abstract:

To model and design light propagation in disordered optical nanostructures and materials, any applicable simulation technique has to cope with enormous computational challenges in a bearable time frame. To circumvent these, the introduction of an artificial periodicity to the disordered particle structure allows to rely on computational techniques that exploit periodic boundary conditions. Choosing a rather large periodicity promises to preserve randomness in form of a close-range disorder but can introduce false interferences. So far, it remains open how the artificial periodicity has to be chosen to minimize its detrimental influence. Here, we combine the superposition T-matrix scheme with an Ewald sum formulation to account for light scattering in periodic particle arrangements that contain hundreds to thousands of individual scatterers per unit cell. Simulations reveal that the periodicity’s influence cannot be minimized by simply choosing one single period much longer than the excitation wavelength. The excitation of lattice induced resonances prevents so. However, choosing a periodicity that does not sustain such detrimental features allows for reliable predictions. ... mehr


Postprint §
DOI: 10.5445/IR/1000134951
Veröffentlicht am 07.11.2022
Originalveröffentlichung
DOI: 10.1016/j.jqsrt.2021.107802
Scopus
Zitationen: 13
Dimensions
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT 3D Matter Made to Order (3DMM2O)
Institut für Mikrostrukturtechnik (IMT)
Institut für Nanotechnologie (INT)
Institut für Theoretische Festkörperphysik (TFP)
Universität Karlsruhe (TH) – Interfakultative Einrichtungen (Interfakultative Einrichtungen)
Karlsruhe School of Optics & Photonics (KSOP)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2021
Sprache Englisch
Identifikator ISSN: 0022-4073
KITopen-ID: 1000134951
HGF-Programm 43.32.02 (POF IV, LK 01) Designed Optical Materials
Erschienen in Journal of quantitative spectroscopy & radiative transfer
Verlag Elsevier
Band 272
Seiten Article no: 107802
Nachgewiesen in Dimensions
Scopus
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