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Optical beam deflectors based on the combination of cholesteric liquid crystals and polymer micro
gratings are reported. Dual frequency cholesteric liquid crystal (DFCh-LC) is adopted to accelerate the
switching from the homeotropic state back to the planar state. Polarization independent beam steering
components are realized whose transmission versus the polarizing angle only varies 4.4% and 2.6%
for the planar state and the homeotropic state, respectively. A response time of 451 ms is achieved
for DFCh-LC-grating beam deflectors, which is fast compared to other nematic LC beam steerers with
similar LC thickness
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