Electrohydrodynamic instabilities in chiral smectic C cells
作者:
J.A. M. M. Van Haaren,
期刊:
Liquid Crystals
(Taylor Available online 1993)
卷期:
Volume 14,
issue 2
页码: 297-306
ISSN:0267-8292
年代: 1993
DOI:10.1080/02678299308027644
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Experimental results are presented on the optical response of chiral smectic C cells of various thicknesses (between 2 and 9 μm) on AC voltages. For part of the voltage and frequency range the electric field induces patterns of disclination lines. The threshold voltages for these electrohydrodynamic instabilities turn out to be independent of the cell thickness for 4, 6, and 9 μm cell gaps. In the 2 μm cells, structural changes of the chiral smectic C texture are found at voltages below the threshold for the instabilities. The applicability of the Carr-Helfrich model for electrohydrodynamic instabilities in nematics to these chiral smectic C layers is discussed.
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