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Enhanced Magnetic Second-Harmonic Generation from Resonant Metasurfaces

Kruk, S; Weismann, M; Bykov, AY; Mamonov, EA; Kolmychek, IA; Murzina, T; Panoiu, NC; ... Kivshar, YS; + view all (2015) Enhanced Magnetic Second-Harmonic Generation from Resonant Metasurfaces. ACS Photonics , 2 (8) pp. 1007-1012. 10.1021/acsphotonics.5b00215. Green open access

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Abstract

We study, both experimentally and theoretically, the second-order nonlinear response from resonant metasurfaces composed of metal–dielectric nanodisks. We demonstrate that by exciting the resonant optical modes of the composite nanoparticles we can achieve strong enhancement of the second-harmonic signal from the metasurface. By employing a multipole expansion method for the generated second-harmonic radiation, we show that the observed SHG enhancement is due to the magnetic dipolar and electric quadrupolar second-order nonlinear response of the metasurface.

Type: Article
Title: Enhanced Magnetic Second-Harmonic Generation from Resonant Metasurfaces
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsphotonics.5b00215
Publisher version: http://dx.doi.org/10.1021/acsphotonics.5b00215
Language: English
Additional information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see: http://dx.doi.org/10.1021/acsphotonics.5b00215.
Keywords: nonlinear optics, second-harmonic generation, plasmonic nanoparticles, optical magnetism, multipole decomposition
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1479885
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