Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal

S. M. Morris, M. M. Qasim, K. T. Cheng, F. Castles, D. H. Ko, D. J. Gardiner, S. Nosheen, T. D. Wilkinson, H. J. Coles, C. Burgess, L. Hill

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25 引文 斯高帕斯(Scopus)

摘要

We report the demonstration of an optically activated shutter based upon a short-pitch chiral nematic liquid crystal (LC) device sandwiched between crossed polarizers. This LC is comprised of photo-active chiral dopants. In the trans-state, the LC appears dark between crossed polarizers due to the very short pitch. As the pitch is extended through exposure to ultraviolet light, the device becomes transmissive reaching a maximum for a particular value of the pitch. As a result, it is possible to switch between the light and dark states by subjecting the device to visible light so as to cause a cis-trans photo-isomerisation.

原文???core.languages.en_GB???
文章編號101105
期刊Applied Physics Letters
103
發行號10
DOIs
出版狀態已出版 - 2 9月 2013

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