7 March 2016 Continuous phase modulation in polymer-stabilized liquid crystals
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Proceedings Volume 9769, Emerging Liquid Crystal Technologies XI; 976912 (2016) https://doi.org/10.1117/12.2222379
Event: SPIE OPTO, 2016, San Francisco, California, United States
Continuous optical phase modulation was systematically investigated in a nematic host liquid crystal (LC), which was stabilized with in-situ generated photopolymer. Various driving modes were investigated. With presence of a chiral dopant, polarization independent and fast electro-optic responses were found in both blue phase mode and uniformly standing helix mode. Anyway, high driving voltages > 100 V were required to achieve phase modulation depths > π in reflective test cells with planar electrodes. In contrast, much lower driving voltages < 15 V were required in a polymernetwork LC based on the same host LC if no chiral dopant was present. In this driving mode, high phase contrast and sums of response times (ton+toff ) ≈ 3 – 4 ms were found, fast enough to achieve 200-400 Hz modulations.
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A. Lorenz, L. Braun, V. Kolosova, R. Hyman, T. D. Wilkinson, "Continuous phase modulation in polymer-stabilized liquid crystals", Proc. SPIE 9769, Emerging Liquid Crystal Technologies XI, 976912 (7 March 2016); doi: 10.1117/12.2222379; https://doi.org/10.1117/12.2222379

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