Electromagnetic polarization-controlled perfect switching effect with high-refractive-index dimers and the beam-splitter configuration

Ángela I. Barreda, Hassan Saleh, Amelie Litman, Francisco González, Jean-Michel Geffrin and Fernando Moreno ()
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Ángela I. Barreda: Group of Optics, University of Cantabria
Hassan Saleh: Aix-Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel
Amelie Litman: Aix-Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel
Francisco González: Group of Optics, University of Cantabria
Jean-Michel Geffrin: Aix-Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel
Fernando Moreno: Group of Optics, University of Cantabria

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Sub-wavelength particles made from high-index dielectrics, either individual or as ensembles, are ideal candidates for multifunctional elements in optical devices. Their directionality effects are traditionally analysed through forward and backward measurements, even if these directions are not convenient for in-plane scattering practical purposes. Here we present unambiguous experimental evidence in the microwave range that for a dimer of HRI spherical particles, a perfect switching effect is observed out of those directions as a consequence of the mutual particle electric/magnetic interaction. The binary state depends on the excitation polarization. Its analysis is performed through the linear polarization degree of scattered radiation at a detection direction perpendicular to the incident direction: the beam-splitter configuration. The scaling property of Maxwell’s equations allows the generalization of our results to other frequency ranges and dimension scales, for instance, the visible and the nanometric scale.

Date: 2017
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DOI: 10.1038/ncomms13910

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