CUED Publications database

Photomechanically Induced Phase Transitions in Ferroelectric Liquid Crystals

Walton, HG and Coles, HJ (1993) Photomechanically Induced Phase Transitions in Ferroelectric Liquid Crystals. Ferroelectrics, 147. pp. 223-240. ISSN 0015-0193

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We report optically induced phase transtions occurring in two different host ferroelectric liquid crystals; SCE13 a multicomponentmixture optimised for room temperature performance, and CE8 a single component liquid crystal. These act as host liquid crystals for a novel guest azo dye, which can be made to photoisomerise using low power density U.V. illumination, resulting in dramatic changes in sample properties. We have shown that the magnitude of spontaneous polarisation of systems can be isothermally and reversibly induced or reduced, with the consequent appearance or disappearance of optical switching hysteresis. We discuss the parameters controlling the behaviour of the systems under U.V. illumination and suggest mechansims by which the transitions may occur. © 1993, Taylor & Francis Group, LLC. All rights reserved.

Item Type: Article
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:28
Last Modified: 21 Dec 2017 01:43