ItemArticle

Sign reversal of the spontaneous and induced polarisation in a mixture of achiral liquid crystal host and chiral azo dopant

Title
Sign reversal of the spontaneous and induced polarisation in a mixture of achiral liquid crystal host and chiral azo dopant
Creator
Tsutsumi O.; Nakano M.; Hegde G.; Komitov L.
Description
Achiral liquid crystal, possessing orthogonal smectic A and tilted smectic C phases in its phase sequence, was doped with a chiral photochromic azo dopant. It was found that the spontaneous and induced polarisation in the tilted smectic C* phase and in the orthogonal smectic A phase, respectively, change their sign, as well as their magnitude, under illumination with UV light. The origin of this sign reversal effect is considered to be the different sign of the molecular net dipole moment component y of trans- and cis-isomers of the photochromic azo dopant, respectively. This light-induced sign reversal effect seems to have large potential for applications in the light-light controlled photonic liquid crystal devices, based on this effect. 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Source
Liquid Crystals, Vol-50, No. 5, pp. 872-880.
Date
2023-01-01
Publisher
Taylor and Francis Ltd.
Subject
Achiral liquid crystal; azo dopant; polarisation; sign reversal
Coverage
Tsutsumi O., Department of Applied Chemistry, Ritsumeikan University, Kusatsu, Japan; Nakano M., IP Department, UBE Industries, Ltd, Yamaguchi, Japan; Hegde G., Centre for Advanced Research and Development (CARD), CHRIST (Deemed to be University), Bangalore, India, Department of Chemistry, Christ University (Deemed to be University), Bengaluru, India; Komitov L., Centre for Advanced Research and Development (CARD), CHRIST (Deemed to be University), Bangalore, India, Department of Physics, University of Gothenburg, Gothenburg, Sweden
Rights
All Open Access; Hybrid Gold Open Access
Relation
ISSN: 2678292; CODEN: LICRE
Format
Online
Language
English
Type
Article

Collection

Articles

Citation

Tsutsumi O.; Nakano M.; Hegde G.; Komitov L., “Sign reversal of the spontaneous and induced polarisation in a mixture of achiral liquid crystal host and chiral azo dopant,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 27, 2025, https://archives.christuniversity.in/items/show/14657.

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