Circularly-polarized, large-angle reflective deflectors based on periodically patterned cholesteric liquid crystals
Optical Data Processing and Storage(2017)
Abstract
AbstractPatterned cholesteric liquid crystals enable the fabrication of circular-polarization sensitive, reflective diffractive optical elements based on Bragg reflection. Here we report the fabrication of large-angle reflective deflector, which show deflection angles as large as 48.9°. The devices are fabricated by polarization holography, whereby two orthogonal circular polarized beams are superimposed on a photoalignment layer to create a linear modulation of the orientational easy axis. The devices show high circular-polarization extinction ratios, making them potentially useful as functional reflectors and polarization splitters.
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Key words
reflective deflectors,liquid crystals,circularly-polarized,large-angle
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