Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 19, Issue 3, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2013.2241399
Keywords
Antenna arrays; lenses; metamaterials; optical polarization; optical surface waves; phased arrays
Categories
Funding
- Harvard Nanoscale Science and Engineering Center [NSF/PHY 06-46094]
- Center for Nanoscale Systems at Harvard University
- Defense Advanced Research Projects Agency (DARPA) N/MEMS S&T Fundamentals program under Space and Naval Warfare Systems Center Pacific [N66001-10-1-4008]
- Robert A. Welch Foundation [A-1261]
- National Science Foundation
- European Communities Seventh Framework Programme [PIOF-GA-2009-235860]
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Conventional optical components rely on the propagation effect to control the phase and polarization of light beams. One can instead exploit abrupt phase and polarization changes associated with scattered light from optical resonators to control light propagation. In this paper, we discuss the optical responses of anisotropic plasmonic antennas and a new class of planar optical components (metasurfaces) based on arrays of these antennas. To demonstrate the versatility of metasurfaces, we show the design and experimental realization of a number of flat optical components: 1) metasurfaces with a constant interfacial phase gradient that deflect light into arbitrary directions; 2) metasurfaces with anisotropic optical responses that create light beams of arbitrary polarization over a wide wavelength range; 3) planar lenses and axicons that generate spherical wavefronts and nondiffracting Bessel beams, respectively; and 4) metasurfaces with spiral phase distributions that create optical vortex beams of well-defined orbital angular momentum.
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