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Multipolar analysis of second-harmonic generation in (111) Gallium Arsenide nanoparticles

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

Details

Original languageEnglish
Title of host publication4th International Conference on Metamaterials and Nanophotonics, METANANO 2019
PublisherIOP Publishing
Number of pages4
DOIs
Publication statusPublished - 2020
Publication typeA4 Article in a conference publication
EventInternational Conference on Metamaterials and Nanophotonics, METANANO 2019 - St. Petersburg, Russian Federation
Duration: 15 Jul 201919 Jul 2019

Publication series

NameJournal of Physics: Conference Series
PublisherIOP Publishing
Volume1461
ISSN (Print)1742-6588

Conference

ConferenceInternational Conference on Metamaterials and Nanophotonics, METANANO 2019
CountryRussian Federation
CitySt. Petersburg
Period15/07/1919/07/19

Abstract

We perform multipolar analysis of second-harmonic generation (SHG) from (111)-grown gallium arsenide (GaAs) nanoantennas and discuss its specifics. It was experimentally demonstrated that the conversion efficiency in axially-symmetric (111) GaAs nanoparticles remains constant under the polarization rotation of normally incident radiation in a wide range of particle sizes, while the SHG radiation pattern changes. We apply the analytical method based on the Lorentz lemma to explain this behaviour. The induced nonlinear current is decomposed into two rotating contributions, which are shown to generate multipoles of different parities. Thus, the total SHG intensity in the far-field is proved to be independent of the in-plane rotation of the pump polarization. Nevertheless, due to the threefold symmetry of the crystal with regard to the (111) direction, the SHG radiation pattern rotates around the polar axis repeating its shape every 60°.

ASJC Scopus subject areas

Publication forum classification

Field of science, Statistics Finland