Preliminary communication Anomalous behaviour of photoactive free-standing smectic films under illumination
作者:
E.I. DEMIKHOV,
M. JOHN,
K. KROHN,
期刊:
Liquid Crystals
(Taylor Available online 1997)
卷期:
Volume 23,
issue 3
页码: 443-445
ISSN:0267-8292
年代: 1997
DOI:10.1080/026782997208361
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Illumination of free-standing smectic films doped with azo dyes produces bubbles in the SmA phase; these cannot be observed in bulk samples. The bubbles appear in the films with some time delay after the beginning of illumination. This time delay depends linearly on (T where T is the smectic A-isotropic transition temperature. This dependence shows that IA illumination induces in the interior of the films a smectic A-isotropic phase transition. The SmC* in-plane director field configuration depends on the orientation of the polarization plane of the incident light. In the SmC* phase no bubbles are observed even on continuous illumination. T), IA
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