Publication: Dielectric Fourier metasurfaces as wide-angle Y-junction switches
Дата
2021
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Аннотация
Dielectric Fourier metasurfaces-thin layers of strongly refracting transparent materials with periodic surface nanoreliefs-are capable of versatile flat-optical functionalities, including anomalous refraction in up to near-grazing directions. Describing the reliefs by a few Fourier coefficients, one can straightforwardly optimize them numerically or, eventually, analytically in terms of the Rayleigh hypothesis. We demonstrate that silicon Fourier metasurfaces supporting anomalous refraction in near-grazing directions can be employed as efficient optical Y-junction switches. Operating in the vicinity of a certain diffraction order cutoff, they can drastically alter the direction of outgoing light due to subtle variations of the optical setup. As examples, we show the possibility to deflect 70%-80% of the power of green light by more than 150 degrees when the incoming beam is inclined by only 2 degrees, or when the relative substrate permittivity is varied by 0.1. We also evaluate the prospects of metasurfaces made of other weaker-refracting transparent materials.
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Antonov, A. A. Dielectric Fourier metasurfaces as wide-angle Y-junction switches / Antonov, AA, Gorkunov, MV // Journal of Optics (United Kingdom). - 2021. - 23. - № 12. - 10.1088/2040-8986/ac3298
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https://www.doi.org/10.1088/2040-8986/ac3298
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https://openrepository.mephi.ru/handle/123456789/24960
https://www.scopus.com/record/display.uri?eid=2-s2.0-85120796012&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000719102400001
https://openrepository.mephi.ru/handle/123456789/24960