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Nano Lett. 2015 Sep 9;15(9):6261-6. doi: 10.1021/acs.nanolett.5b02926. Epub 2015 Aug 21.

High-Efficiency All-Dielectric Metasurfaces for Ultracompact Beam Manipulation in Transmission Mode.

Author information

1
Department of Electrical Engineering, University at Buffalo, The State University of New York , Buffalo, New York 14260, United States.
2
Toronto Nanofabrication Centre, University of Toronto , Toronto, ON M5S 3G4, Canada.
3
CST, Inc. , San Mateo, California 94404, United States.
4
Physics Department, M.V. Lomonosov Moscow State University , Moscow 119991, Russia.

Abstract

Metasurfaces are two-dimensional structures enabling complete control on light amplitude, phase, and polarization. Unlike plasmonic metasurfaces, silicon structures facilitate high transmission, low losses, and compatibility with existing semiconductor technologies. We experimentally demonstrate two examples of high-efficiency polarization-sensitive dielectric metasurfaces with 2π phase control in transmission mode (45% transmission efficiency for the vortex converter and 36% transmission efficiency for the beam steering device) at telecommunication wavelengths. Silicon metasurfaces are poised to enable a versatile platform for the realization of all-optical circuitry on a chip.

KEYWORDS:

All-dielectric metasurface; nanoblocks; orbital angular momentum; singular optics; structured light

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