Journal
NANO LETTERS
Volume 15, Issue 9, Pages 6261-6266Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b02926
Keywords
All-dielectric metasurface; nanoblocks; singular optics; orbital angular momentum; structured light
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Funding
- U.S. Army Research Office Award [W911NF-11-1-0333]
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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 2 pi 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.
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