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Issue 29, 2016
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Unidirectional light scattering with high efficiency at optical frequencies based on low-loss dielectric nanoantennas

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Abstract

Dielectric nanoparticles offer low optical losses and access to both electric and magnetic Mie resonances. This enables unidirectional scattering along the incident axis of light, owing to the interference between these two resonances. Here we theoretically and experimentally demonstrate that an asymmetric dimer of dielectric nanoparticles can provide unidirectional forward scattering with high efficiency. Theoretical analyses reveal that the dimer configuration can satisfy the first Kerker condition at the resonant peaks of electric and magnetic dipolar modes, therefore showing highly efficient directional forward scattering. The unidirectional forward scattering with high efficiency is confirmed in our experiments using a silicon nanodisk dimer on a transparent substrate. This study will boost the realization of practical applications using low-loss and efficient subwavelength all-dielectric nanoantennas.

Graphical abstract: Unidirectional light scattering with high efficiency at optical frequencies based on low-loss dielectric nanoantennas

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Supplementary files

Article information


Submitted
29 May 2016
Accepted
28 Jun 2016
First published
29 Jun 2016

This article is Open Access

Nanoscale, 2016,8, 14184-14192
Article type
Paper
Author version available

Unidirectional light scattering with high efficiency at optical frequencies based on low-loss dielectric nanoantennas

T. Shibanuma, P. Albella and S. A. Maier, Nanoscale, 2016, 8, 14184
DOI: 10.1039/C6NR04335F

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