Optical spatial differentiation with ultrathin freestanding subwavelength gratings

Ali A. Darki*, Aurélien Dantan, Jens V. Nygaard, Søren P. Madsen, Alexios Parthenopoulos, Christian Toft-Vandborg, Christian Vandborg

*Corresponding author af dette arbejde

Publikation: Bidrag til bog/antologi/rapport/proceedingKonferencebidrag i proceedingsForskningpeer review

Abstract

We investigate spatial differentiation of optical beams using guided mode resonances in suspended dielectric one-dimensional photonic crystals. Various SiN grating structures are characterized under various incidence, polarization and beam size illuminations. We first observe first- and second-order spatial differentiation in transmission of Gaussian beams impinging at oblique and normal incidence, respectively, on gratings designed to be resonant for either TE- or TM-polarized incident light. Polarization-independent first-order spatial differentiation is then demonstrated with a specifically designed, doubly-resonant, one-dimensional and symmetric grating structure. Such ultrathin and essentially lossfree nanostructured dielectric films are promising for various optical processing, optomechanics and sensing applications.

OriginalsprogEngelsk
TitelOptics, Photonics and Digital Technologies for Imaging Applications VII
RedaktørerPeter Schelkens, Tomasz Kozacki
ForlagSPIE - International Society for Optical Engineering
Publikationsdatomaj 2022
Artikelnummer121380D
ISBN (Elektronisk)9781510651524
DOI
StatusUdgivet - maj 2022
BegivenhedOptics, Photonics and Digital Technologies for Imaging Applications VII 2022 - Virtual, Online
Varighed: 9 maj 202215 maj 2022

Konference

KonferenceOptics, Photonics and Digital Technologies for Imaging Applications VII 2022
ByVirtual, Online
Periode09/05/202215/05/2022
SponsorCity of Strasbourg, Centre National de la Recherche Scientifique ( CNRS ), iCube, Université de Strasbourg, The Society of Photo-Optical Instrumentation Engineers (SPIE), Université de Strasbourg
NavnProceedings of SPIE - The International Society for Optical Engineering
Vol/bind12138
ISSN0277-786X

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