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Stacked chalcogenide metasurfaces for third harmonic generation in the UV range

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 As 2 S 3 me...

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Published in:New journal of physics 2022-03, Vol.24 (3), p.35005
Main Authors: Vincenti, M A, Gao, J, de Ceglia, D, Frantz, J A, Scalora, M, Litchinitser, N M
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cited_by cdi_FETCH-LOGICAL-c448t-74b68898fca70ab00246eb90aee7f582fde2e1eeb6b17b0337a43e3d800226223
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container_issue 3
container_start_page 35005
container_title New journal of physics
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creator Vincenti, M A
Gao, J
de Ceglia, D
Frantz, J A
Scalora, M
Litchinitser, N M
description 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 As 2 S 3 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 285 nm.
doi_str_mv 10.1088/1367-2630/ac599c
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subjects Absorption
Arsenic trisulfide
chalcogenide glasses
Chalcogenides
harmonic generation
Harmonic generations
Locking
Metasurfaces
nonlinear optics
Physics
Ultraviolet radiation
title Stacked chalcogenide metasurfaces for third harmonic generation in the UV range
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