Nonlinear asymmetric imaging with AlGaAs metasurface

Year: 2024

Authors: Rocco D., Locatelli A., Carletti L., Vincenti MA., De Angelis C.

Autors Affiliation: Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; Natl Inst Opt Natl Res Council INO CNR, Via Branze 45, I-25123 Brescia, Italy.

Abstract: Nowadays, dielectric metasurfaces are a promising platform in many different research fields such as sensing, lasing, all -optical modulation and nonlinear optics. Among all the different kinds of such thin structures, asymmetric geometries are recently attracting increasing interest. In particular, nonlinear light -matter interaction in metasurfaces constitutes a valid approach for achieving miniaturized control over light. Here, we demonstrate nonlinear asymmetric generation of light in a dielectric metasurface via second harmonic generation. By inverting the illumination direction of the pump, the nonlinear emitted power is modulated by more than one order of magnitude. Moreover, we demonstrate how a properly designed metasurface can generate two completely different images at the second harmonic when the direction of illumination is reversed. Our results may pave the way to important opportunities for the realization of compact nanophotonic devices for imaging applications by densely integrating numerous nonlinear resonators.

Journal/Review: OPTICS EXPRESS

Volume: 32 (7)      Pages from: 11673  to: 11680

More Information: Ministero dell’Universita e della Ricerca (PRIN 2020, PRIN 2022, PRIN 2022, PRIN 2022, PRIN 2022, PRIN PNRR 2022, project DOSE (2022MANFK5) , project FLAIRS (P2022RFF9K) , project FLAIRS (P2022RFF9K) Next generation EU, project GRACE6G (2022H7RR4F) , Project METEOR (2020EY2LJT) , Project NO LIMITHz (2022BC5BW5) , Project PILLARS (2022YJ5AZH) ) .
KeyWords: 2nd-harmonic Generation
DOI: 10.1364/OE.517991

Citations: 2
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20
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