Polarizability and Light Scattering by Subwavelength Graded-Index Plasmonic Spheres

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Date
2018
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Language
en
Pages
871-872
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2018 IEEE AP-S Symposium on Antennas and Propagation and URSI CNC/USNC Joint Meeting (AP-S/URSI 2018) Proceedings, July 8 - 13, 2018, Boston, Massachusetts, U.S.A., Digest of the IEEE Antennas and Propagation Society International Symposium
Abstract
Light scattering by a subwavelength sphere exhibiting radially inhomogeneous permittivity is here presented. The theoretical foundations describing the scattering response are given in a simple manner and the concept of polarizability is generalized incorporating the inhomogeneity effects. Two illustrative examples are briefly discussed, i.e., a power-law and a Drude-like inhomogeneous profile, exposing the physical mechanisms of their scattering response. The presented results can open the path towards the implementation of graded-index subwavelength particles in modern nanoantenna applications.
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Tzarouchis , D & Sihvola , A 2018 , Polarizability and Light Scattering by Subwavelength Graded-Index Plasmonic Spheres . in 2018 IEEE AP-S Symposium on Antennas and Propagation and URSI CNC/USNC Joint Meeting (AP-S/URSI 2018) Proceedings, July 8 - 13, 2018, Boston, Massachusetts, U.S.A. . Digest of the IEEE Antennas and Propagation Society International Symposium , IEEE , United States , pp. 871-872 , IEEE International Symposium on Antennas and Propagation and USNC/URSI Radio Science Meeting , Boston , Massachusetts , United States , 08/07/2018 . https://doi.org/10.1109/APUSNCURSINRSM.2018.8608310