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Title: Asymmetric Scattering and Reciprocity in a Plasmonic Dimer
Author: Kuntman, Mehmet Ali
Kuntman, Ertan
Arteaga Barriel, Oriol
Keywords: Dispersió de la llum
Lleis de reciprocitat
Light scattering
Reciprocity theorems
Issue Date: 29-Oct-2020
Publisher: MDPI
Abstract: We study the scattering of polarized light by two equal corner stacked Au nanorods that exhibit strong electromagnetic coupling. In the far field, this plasmonic dimer manifests very prominent asymmetric scattering in the transverse direction. Calculations based on a system of two coupled oscillators, as well as simulations based on the boundary element method, show that, while in one configuration both vertical and horizontal polarization states are scattered to the detector, when we interchange the source and the detector, the scattered intensity of the horizontal polarization drops to zero. Following Perrin's criterion, it can be shown that this system, as well as any other linear system not involving magneto-optical effects, obeys the optical reciprocity principle. We show that the optical response of the plasmonic dimer, while preserving electromagnetic reciprocity, can be used for the non-reciprocal transfer of signals at a subwavelength scale.
Note: Reproducció del document publicat a:
It is part of: Symmetry, 2020, vol. 12, num. 11, p. 1790
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ISSN: 2073-8994
Appears in Collections:Articles publicats en revistes (Física Aplicada)

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