期刊
NANO LETTERS
卷 12, 期 12, 页码 6328-6333出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl303445u
关键词
Plasmonics; optical antenna; metasurface; wave plate; broadband
类别
资金
- National Science Foundation
- Harvard Nanoscale Science and Engineering Center (NSEC) [NSF/PHY 06-46094]
- Center for Nanoscale Systems (CNS) at Harvard University
- Defense Advanced Research Projects Agency (DARPA) N/MEMS S&T Fundamentals program [N66001-10-1-4008]
- Space and Naval Warfare Systems Center Pacific (SPAWAR)
- Robert A. Welch Foundation [A-1261]
- European Communities Seventh Framework Programme (FP7) [PIOF-GA-2009-235860]
- National Science Foundation through a Graduate Research Fellowship
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 lambda = 5 to 12 mu m, representing a major advance in performance compared to previously reported plasmonics-based wave plates.
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