4 May 2018 Simulation of light scattering in clusters of nonspherical nanoparticles: an adapted T-matrix approach
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Abstract
Being restricted to the domain of validity of spherical wave expansions, the T-matrix method has been in question to model light scattering by nonspherical particle systems when inter-particle distances are low. In this work, we discuss a formalism to account for multiple scattering between nonspherical particles in close vicinity. Accurate coupling between adjacent particles’ scattered fields is achieved by an alternative plane-wave formulation of the translation operator for spherical vector wave functions. The accuracy of the presented approach is demonstrated by a far field simulation of a large particle cluster. The near field of nonspherical particles has not been accessible in T-matrix simulations thus far. Utilizing the benefits of plane-wave expansions, the near field of nonspherical particles can be constructed in T-matrix simulations. We hereby show that the T-matrix method is also applicable for the analysis of localized resonances, making it suitable for the description of plasmonic systems.
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Dominik Theobald, Dominik Theobald, Amos Egel, Amos Egel, Guillaume Gomard, Guillaume Gomard, Uli Lemmer, Uli Lemmer, "Simulation of light scattering in clusters of nonspherical nanoparticles: an adapted T-matrix approach", Proc. SPIE 10672, Nanophotonics VII, 1067229 (4 May 2018); doi: 10.1117/12.2305921; https://doi.org/10.1117/12.2305921
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