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Updated: Feb 25, 2026

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
Fast switching cholesteric liquid crystal optical beam deflector with polarization independence
Xiaobing Shang1, Laurens Meeus2, Dieter Cuypers1
1Ghent University and imec, Department of Electronics and Information Systems, Ghent, 9052, Belgium.
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.
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