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Nano Lett. 2012 Dec 12;12(12):6328-33. doi: 10.1021/nl303445u. Epub 2012 Nov 13.

A broadband, background-free quarter-wave plate based on plasmonic metasurfaces.

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  • 1School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.

Abstract

We demonstrate optically thin quarter-wave plates built with metasurfaces that generate high-quality circularly polarized light over a broad wavelength range for arbitrary orientation of the incident linear polarization. The metasurface consists of an array of plasmonic antennas with spatially varying phase and polarization responses. Experimentally demonstrated quarter-wave plates generate light with a high degree of circular polarization (>0.97) from λ = 5 to 12 μm, representing a major advance in performance compared to previously reported plasmonics-based wave plates.

PMID:
23130979
[PubMed - indexed for MEDLINE]
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