Superdirective magnetic nanoantennas with effect of light steering: Theory and experiment

A. E. Krasnok, D. S. Filonov, A. P. Slobozhanyuk, P. A. Belov, C. R. Simovski, Yu S. Kivshar

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We introduce a novel concept of superdirective nanoantennas based on the generation of higher-order optically-induced magnetic multipoles. Such an all-dielectric nanoantenna can be realized as an optically small spherical dielectric nanoparticle with a notch excited by a point source located in the notch. Proposed superdirectivity effect is not associated with high dissipative losses, because of the magnetic nature of the nanoantenna operation. 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 scaling to the microwave frequency range.

Original languageEnglish
Title of host publication2013 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2013
DOIs
StatePublished - 2013
Externally publishedYes
Event2013 15th SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2013 - Rio de Janeiro, Brazil
Duration: 4 Aug 20137 Aug 2013

Publication series

NameSBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Proceedings

Conference

Conference2013 15th SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2013
Country/TerritoryBrazil
CityRio de Janeiro
Period4/08/137/08/13

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