New method of determination of the Fréedericksz threshold based upon precise fluctuation measurement

In this paper we report a new method for determining the critical threshold of the Fréedericksz transition driven by an electric field. It is based on the measurement of the amplitude of the molecule fluctuations as a function of the voltage difference applied to a planar nematic cell. The precise m...

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Bibliographic Details
Published in:arXiv.org 2013-08
Main Authors: Caussarieu, Aude, Petrosyan, Artyom, Ciliberto, Sergio
Format: Article
Language:English
Subjects:
Electric fields
Freedericksz transitions
Liquid crystals
Variation
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Summary:In this paper we report a new method for determining the critical threshold of the Fréedericksz transition driven by an electric field. It is based on the measurement of the amplitude of the molecule fluctuations as a function of the voltage difference applied to a planar nematic cell. The precise measurement of the director fluctuations of the liquid crystal is made possible by the use of a very precise and sensitive polarization interferometer. The great advantage of the method is that it does not depend on complex fits as it is usually done in literature.
ISSN:2331-8422