Journal
NANO LETTERS
Volume 12, Issue 3, Pages 1702-1706Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl300204s
Keywords
Plasmonics; optical antenna; metasurfaces; reflection; phase discontinuities; Snell's Law
Categories
Funding
- Defense Advanced Research Projects Agency (DARPA) N/MEMS [N66001-10-1-4008]
- Space and Naval Warfare Systems Center Pacific (SPAWAR)
- National Science Foundation
- Harvard Nanoscale Science and Engineering Center (NSEC) [NSF/PHY 06-46094]
- Center for Nanoscale Systems (CNS) at Harvard University
- Robert A. Welch Foundation [A-1261]
- European Communities [PIOF-GA-2009-235860]
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Experiments on ultrathin anisotropic arrays of subwavelength optical antennas display out-of-plane refraction. A powerful three-dimensional (3D) extension of the recently demonstrated generalized laws of refraction and reflection shows that the interface imparts a tangential wavevector to the incident light leading to anomalous beams, which in general are noncoplanar with the incident beam. The refracted beam direction can be controlled by varying the angle between the plane of incidence and the antenna array.
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