Journal
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
Volume 202, Issue -, Pages 279-285Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jqsrt.2017.08.016
Keywords
Scattering; T-Matrix; Substrate; Discrete sources method; Multiple scattering
Categories
Funding
- Karlsruhe School of Optics & Photonics (KSOP)
- Helmholtz Postdoc Program
- DFG through the priority programme 1839 Tailored disorder
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The simulation of light scattering by particles on a substrate with the T-matrix method relies on the expansion of the scattered field in spherical waves, followed by a plane wave expansion to allow the evaluation of the reflection from the substrate. In practice, the plane wave expansion (i.e., the Sommerfeld integrals) needs to be truncated at a maximal in-plane wavenumber kappa(max). An appropriate selection of kappa(max) is essential: counter-intuitively, the overall accuracy can degrade significantly if the integrals are truncated with a too large value. In this paper, we propose an empirical formula for the selection of Km., and discuss its application using a number of example simulations with dielectric and metallic oblate spheroids on dielectric and metallic substrates. The computed differential scattering cross sections are compared to results obtained from the discrete-sources method. (C) 2017 Elsevier Ltd. All rights reserved.
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