Journal
OPTICS EXPRESS
Volume 21, Issue 22, Pages 27438-27451Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.027438
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- Danish Council for Independent Research [09-072949, 12-124690]
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We numerically study the optical properties of metal-insulatormetal resonators and metasurfaces, emphasizing the presence of gap-surface plasmon (GSP) resonances and their connection to the optical response. In relation to birefringent metal-backed metasurfaces, we show how a combination of metal nanobrick and nanocross elements allows one to fully control the phase of reflected light for two orthogonal polarizations simultaneously. The approach is exemplified by the design of a gradient birefringent metasurface that reflects two orthogonal polarization states into +2 and -3 diffraction order, respectively, with a reflectivity up to similar to 80% and in a broad wavelength range around the design wavelength of 800 nm. Finally, we introduce the concept of metascatterers, which are wavelength-sized polarization-sensitive scatterers. (C) 2013 Optical Society of America
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