Anomalous reflection of visible light by all-dielectric gradient metasurfaces
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Date
2017-03-15
Authors
Tsitsas, Nikolaos L.
Valagiannopoulos, Constantinos
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of the Optical Society of America B
Abstract
Plane wave scattering by a planar metasurface composed of two periodically alternating rectangular dielectric rods
is considered. A rigorous integral equation methodology is employed for the analysis and the accurate determination
of the reflected and transmitted fields. Systematic optimizations with respect to the configuration’s
parameters are performed, which reveal that it is possible to obtain significantly enhanced anomalous reflection
(with simultaneously suppressed ordinary reflection predicted by Snell’s law) with power varying from 92% to
almost 100% of the input one, depending on the color of the incident light. It is shown that these reflection
properties are supported by metasurfaces easily realizable with specific low-loss dielectric materials. In this
way, several all-dielectric optimal designs are reported that can be used in numerous applications demanding
anomalous reflection in the visible range
Description
Keywords
Diffraction and gratings, Metamaterials, Linear and nonlinear light scattering from surfaces
Citation
Tsitsas, Nikolaos L., Valagiannopoulos, Constantinos. 2017. Anomalous reflection of visible light by all-dielectric gradient metasurfaces. Journal of the Optical Society of America B. http://nur.nu.edu.kz/handle/123456789/2360