Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 32, Issue 2, Pages 318-323Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.32.000318
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Funding
- National Science Foundation under NSF [ECCS-1028727]
- Directorate For Engineering [1028727] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1028727] Funding Source: National Science Foundation
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The possibility of integration of two important categories of optical components, i.e., circular polarizer and lens, into a thin plasmonic metasurface is examined, for the realistic case when metal losses cannot be neglected, for example when operating in the visible spectrum, or at infrared when non-noble metals are used. We introduce a metasurface made of nanoantennas that offer enough degrees of freedom to control both amplitude and phase of the reflection coefficient. First a theoretical formulation is developed and then an optimal design for a polarizing lens at mid-infrared wavelengths near 4.3 mu m is presented. A two-dimensional array of Y-shaped nanoantennas with polarization-dependent and spatially varying phase response offers the possibility of balancing the losses experienced by the x-and y-polarized incident fields and is the basis for such a compact polarizing lens. (C) 2015 Optical Society of America
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