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Fast switching cholesteric liquid crystal optical beam deflector with polarization independence
oleh: Xiaobing Shang, Laurens Meeus, Dieter Cuypers, Herbert De Smet
Format: | Article |
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Diterbitkan: | Nature Portfolio 2017-07-01 |
Deskripsi
Abstract 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.