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Influence of temperature on dynamics of birefringence switching in photochromic nematic phase

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6 Author(s)
Mysliwiec, Jaroslaw ; Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, Wroclaw 50-370, Poland ; Czajkowski, Maciej ; Bartkiewicz, Stanislaw ; Zygadlo, Krystian
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We present results of dynamic and fast switching of birefringence in a photochromic liquid-crystalline system as a function of the sample temperature. The system consists of photochromic molecules of 4-heptyl-4′-methoxyazobenzene showing a liquid-crystalline nematic state close to room temperature. An experiment of dynamic birefringence switching was done in optical Kerr-effect set-up, where for the sample excitation, a picosecond-pulsed laser was used. Measurements were done for different temperatures of the sample in the liquid-crystalline nematic phase. We have proposed a mathematical model of dynamic, fast, and fully reversible birefringence changes. Theoretical estimations and experimental results have shown very good agreement.

Published in:

Journal of Applied Physics  (Volume:110 ,  Issue: 11 )

Date of Publication:

Dec 2011

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