Open AccessStacked chalcogenide metasurfaces for third harmonic generation in the UV range
Author(s) -
Maria Antonietta Vincenti,
Jinwu Gao,
Domenico de Ceglia,
Jesse A Franz,
Michael Scalora,
Natalia M. Litchinitser
Publication year - 2022
Publication title -
new journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.584
H-Index - 190
ISSN - 1367-2630
DOI - 10.1088/1367-2630/ac599c
Subject(s) - chalcogenide , physics , stacking , absorption (acoustics) , harmonic , optoelectronics , optics , high harmonic generation , photonics , range (aeronautics) , dispersion (optics) , nonlinear optics , materials science , quantum mechanics , nuclear magnetic resonance , composite material , laser
We show that an appropriately designed chalcogenide metasurface allows the enhancement of harmonic generation in the UV range, a regime that conventional wisdom deems inaccessible because of absorption. Here we exploit a combination of the photonic band structure that forms when stacking As2S3 metasurfaces, phase-locking, nonlinear dispersion, and improved field localization to enhance third harmonic conversion efficiency. We demonstrate an improvement of two orders of magnitude with respect to the single layer counterpart notwithstanding the fact that the harmonic signal is tuned deep in the absorption range at 285nm.