Third-harmonic light polarization control in magnetically resonant silicon metasurfaces

Year: 2021

Authors: Tognazzi A., Okhlopkov K.I., Zilli A., Rocco D., Fagiani L., Mafakheri E., Bollani M., Finazzi M., Celebrano M., Shcherbakov M.R., Andrey A. Fedyanin; De Angelis C.

Autors Affiliation: Department of Information Engineering, University of Brescia, Via Branze 38, 25123 Brescia, Italy CNR-INO (National Institute of Optics), Via Branze 45, 25123 Brescia, Italy Faculty of Physics, Lomonosov Moscow State University, Moscow 119991, Russia Department of Physics, Politecnico di Milano, Piazza Leonardo Da Vinci 32, 20133 Milano, Italy CNR-IFN, LNESS laboratory, Via Anzani 42, 22100 Como, Italy

Abstract: Nonlinear metasurfaces have become prominent tools for controlling and engineering light at the nanoscale. Usually, the polarization of the total generated third harmonic is studied. However, diffraction orders may present different polarizations. Here, we design an high quality factor silicon metasurface for third harmonic generation and perform back focal plane imaging of the diffraction orders, which present a rich variety of polarization states. Our results demonstrate the possibility of tailoring the polarization of the generated nonlinear diffraction orders paving the way to a higher degree of wavefront control.

Journal/Review: OPTICS EXPRESS

Volume: 29 (8)      Pages from: 11605  to: 11612

More Information: Ministry of Education and Science of the Russian Federation (14.W03.31.0008); European Commission (828890, 899673); Ministero dell´Istruzione, dell´Universita e della Ricerca (2017MP7F8F).
KeyWords: metasurface, third harmonic, nonlinear diffraction, EBL
DOI: 10.1364/OE.419829

Citations: 13
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