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Proceedings Paper

Continuous phase modulation in polymer-stabilized liquid crystals
Author(s): A. Lorenz; L. Braun; V. Kolosova; R. Hyman; T. D. Wilkinson
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Paper Abstract

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.

Paper Details

Date Published: 7 March 2016
PDF: 9 pages
Proc. SPIE 9769, Emerging Liquid Crystal Technologies XI, 976912 (7 March 2016); doi: 10.1117/12.2222379
Show Author Affiliations
A. Lorenz, Univ. Paderborn (Germany)
L. Braun, Technische Univ. Berlin (Germany)
V. Kolosova, Technische Univ. Berlin (Germany)
R. Hyman, Univ. of Cambridge (United Kingdom)
T. D. Wilkinson, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 9769:
Emerging Liquid Crystal Technologies XI
Liang-Chy Chien; Dick J. Broer; Hirotsugu Kikuchi; Nelson V. Tabiryan, Editor(s)

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