CUED Publications database

Continuous phase modulation in polymer-stabilized liquid crystals

Lorenz, A and Braun, L and Kolosova, V and Hyman, R and Wilkinson, TD (2016) Continuous phase modulation in polymer-stabilized liquid crystals. In: UNSPECIFIED.

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© 2016 SPIE. 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 (t on +t off ) ≈ 3 - 4 ms were found, fast enough to achieve 200-400 Hz modulations.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:01
Last Modified: 07 Jun 2018 02:01