Polarization-independent optical spatial differentiation with a doubly-resonant one-dimensional guided-mode grating

Ali Akbar Darki, Søren Peder Madsen, Aurelien Romain Dantan*

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Abstract

We report on the design and experimental characterization of a suspended silicon nitride subwavelength grating possessing a polarization-independent guided-mode resonance at oblique incidence. At this resonant wavelength we observe that the transverse intensity profile of the transmitted beam is consistent with a first-order spatial differentiation of the incident beam profile in the direction of the grating periodicity, regardless of the incident light polarization. These observations are corroborated by full numerical simulations. The simple one-dimensional and symmetric design, combined with the thinness and excellent mechanical properties of these essentially loss-free dieletric films, is attractive for applications in optical processing, sensing and optomechanics.

OriginalsprogEngelsk
TidsskriftOptics Express
Vol/bind30
Nummer3
Sider (fra-til)3962-3972
Antal sider11
ISSN1094-4087
DOI
StatusUdgivet - 31 jan. 2022

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