Light-induced Freedericksz transition in a nematic liquid crystal with chiral dopant
作者:
DENIS ANDRIENKO,
IGOR PINKEVICH,
VICTOR RESHETNYAK,
期刊:
Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 25,
issue 1
页码: 95-100
ISSN:0267-8292
年代: 1998
DOI:10.1080/026782998206533
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The influence of phototransformed molecules with chiralproperties changing on the absorption of light field on the light-induced Freedericksz transition threshold in a homeotropically oriented nematic cell is considered. It is shown that the appearance of the light-induced chiral molecules can decrease or increase the Freedericksz threshold value depending on the chirality sign of the phototransformed molecules and of the initial chiral dopant. Expressions for the threshold are obtained for circular and linear polarization of the incident light. The dependence of the threshold on the periodicity of the spatially modulated light intensity is estimated for large periods of modulation. The dependence of dopant threshold chirality on the director anchoring energy has been found.
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