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Periodic anchoring condition for alignment of a short pitch cholesteric liquid crystal in uniform lying helix texture

Journal article
Authors Gurumurthy Hegde
Lachezar Komitov
Published in APPLIED PHYSICS LETTERS
Volume 96
Issue 11
Pages 113503 (3 pages)
ISSN 0003-6951
Publication year 2010
Published at Department of Physics (GU)
Pages 113503 (3 pages)
Language en
Links dx.doi.org/10.1063/1.3357420
Subject categories Physical Sciences

Abstract

Due to flexoelectricity, a cholesteric liquid crystal unidirectionally aligned in a sandwich cell, with its helix lying parallel to the confining cell substrates, exhibit a flexoelectro-optic response when subjected to an electric field applied perpendicular to the helix axis. The clarity of the flexoelectro-optic response is dependent on the quality of the uniformly lying helix texture of the cholesteric which often is difficult to achieve. Herein, a method for alignment of a short pitch cholesteric in such a texture by means of a periodic surface anchoring condition with periodicity matching that of the cholesteric liquid crystal is described.

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