Superdirective dielectric nanoantennas with effect of light steering
Optics
2013-07-18 v1
Abstract
We introduce a novel concept of superdirective antennas based on the generation of higher-order optically-induced magnetic multipole modes. All-dielectric nanoantenna can be realized as an optically small spherical dielectric nanoparticle with a notch excited by a point source (e.g. a quantum dot) located in the notch. The superdirectivity effect is not associated with high dissipative losses. For these dielectric nanoantennas we predict the effect of the beam steering at the nanoscale characterized by a subwavelength sensitivity of the beam radiation direction to the source position. We confirm the predicted effects experimentally through the scaling to the microwave frequency range.
Keywords
Cite
@article{arxiv.1307.4601,
title = {Superdirective dielectric nanoantennas with effect of light steering},
author = {Alexander Krasnok and Dmitry Filonov and Alexey Slobozhanyuk and Constantin Simovski and Pavel Belov and Yuri Kivshar},
journal= {arXiv preprint arXiv:1307.4601},
year = {2013}
}