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Polar flexoelectric in-plane and out-of-plane switching in bent core nematic mixtures

Journal article
Authors Omaima Abubakr Elamain
G. Hegde
Lachezar Komitov
Published in Japanese Journal of Applied Physics
Volume 55
Issue 7
ISSN 0021-4922
Publication year 2016
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.7567/jjap.55.071701
Keywords liquid-crystals, Physics
Subject categories Physical Sciences

Abstract

Polar electro-optic response, arising from the coupling between an applied in-plane and out-of-plane dc electric field, respectively, and the flexoelectric polarization of bent core nematic liquid crystal mixtures with hybrid alignment is studied in conventional sandwich cells with homeotropic anchoring at one of the cell substrates and planar at the other. Such a hybrid alignment, however, results in a splay/bend elastic deformation of the nematic giving rise of a flexoelectric polarization. It was found that a pronounced polar electro-optic response, both in-plane and out of plane, took place in the bent core nematic mixtures at very low voltages due to the high flexoelectric polarization in these mixtures, compared with the one observed in calamitic liquid crystals.

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