Near-infrared to ultra-violet frequency conversion in chalcogenide metasurfaces

Jiannan Gao, Maria Antonietta Vincenti, Jesse Frantz, Anthony Clabeau, Xingdu Qiao, Liang Feng, Michael Scalora and Natalia M. Litchinitser ()
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Jiannan Gao: Duke University
Maria Antonietta Vincenti: University of Brescia
Jesse Frantz: US Naval Research Laboratory
Anthony Clabeau: University Research Foundation
Xingdu Qiao: University of Pennsylvania
Liang Feng: University of Pennsylvania
Michael Scalora: Aviation and Missile Center, US Army CCDC
Natalia M. Litchinitser: Duke University

Nature Communications, 2021, vol. 12, issue 1, 1-5

Abstract: Abstract Chalcogenide photonics offers unique solutions for a broad range of applications from mid-infrared sensing to integrated, ultrafast, ultrahigh-bandwidth signal processing. However, to date its usage has been limited to the infrared part of the electromagnetic spectrum, thus avoiding ultraviolet and visible ranges due to absorption of chalcogenide glasses. Here, we experimentally demonstrate and report near-infrared to ultraviolet frequency conversion in an As2S3-based metasurface, enabled by a phase locking mechanism between the pump and the inhomogeneous portion of the third harmonic signal. Due to the phase locking, the inhomogeneous component co-propagates with the pump pulse and encounters the same effective dispersion as the infrared pump, and thus experiences little or no absorption, consequently opening previously unexploited spectral range for chalcogenide glass science and applications, despite the presence of strong material absorption in this range.

Date: 2021
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DOI: 10.1038/s41467-021-26094-1

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