Accurate determination of the Freedericksz transition threshold using a method based upon precise fluctuation measurements

作者：Caussarieu A^*; Petrosyan A; Ciliberto S

来源：Applied Physics Letters, 2013, 103(14): 144109.

DOI：10.1063/1.4823695

In this paper, we describe an accurate method for determining the critical threshold of the Freedericksz 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.

• 出版日期2013-9-30