Abstract
Abstract The electric field effects of a room-temperature cholesteric liquid crystal have been studied. The cholesteric liquid crystal used is MBBA mixed with a small quantity of cholesteryl non-anoate. When a low frequency (~ kHz) AC voltage is applied transversely to the liquid crystal film, grating structures (Williams-Domain-Like Structure and Periodic Distorted Structure) are observed. These structures can be used for the optical modulation of a laser beam. Several observations of electrohydrodynamic instabilities in nematic liquid crystals under the applications of transverse (parallel to the liquid crystal film) electric field were reported in the literature.1.2In this paper the behaviour of a cholesteric liquid crystal film under the applied transverse electric field is discussed.
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