Dynamics and uniformity of reorientation in liquid crystal cells with PVK alignment layers
Dynamics and uniformity of reorientation in liquid crystal cells with PVK alignment layers
We present experimental results on dynamics of Freedericksz transition in liquid crystal cells with alignment layers made of poly(N-vinyl carbazole). DC electric field causes the build-up of, unusually strong, surface charge layers on a liquid crystal-polymer interface that screen liquid crystals from the external field. The process of surface charge build-up and discharge in illuminated areas takes place due to low dark conductivity and high photoconductivity of poly(N-vinyl carbazole), rather than due to its photorefractive nature. If the illuminating beam has a Gaussian profile, reorientation starts from a very small volume, with a clear disclination line in the reorientation spot.
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Dyadyusha, A.
2d1d75d4-60f0-4437-8771-0d0b9a3c7931
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Slussarenko, S.S.
beb09ed1-58ca-4399-9d72-866311f80ef7
2003
Dyadyusha, A.
2d1d75d4-60f0-4437-8771-0d0b9a3c7931
Kaczmarek, M.
408ec59b-8dba-41c1-89d0-af846d1bf327
Slussarenko, S.S.
beb09ed1-58ca-4399-9d72-866311f80ef7
Dyadyusha, A., Kaczmarek, M. and Slussarenko, S.S.
(2003)
Dynamics and uniformity of reorientation in liquid crystal cells with PVK alignment layers.
Electronic Liquid Crystal Communications, .
Abstract
We present experimental results on dynamics of Freedericksz transition in liquid crystal cells with alignment layers made of poly(N-vinyl carbazole). DC electric field causes the build-up of, unusually strong, surface charge layers on a liquid crystal-polymer interface that screen liquid crystals from the external field. The process of surface charge build-up and discharge in illuminated areas takes place due to low dark conductivity and high photoconductivity of poly(N-vinyl carbazole), rather than due to its photorefractive nature. If the illuminating beam has a Gaussian profile, reorientation starts from a very small volume, with a clear disclination line in the reorientation spot.
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Published date: 2003
Identifiers
Local EPrints ID: 15128
URI: http://eprints.soton.ac.uk/id/eprint/15128
PURE UUID: 9bc158f4-def1-40e9-a52b-51373ea167ff
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Date deposited: 16 Mar 2005
Last modified: 15 Mar 2024 05:35
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Author:
A. Dyadyusha
Author:
S.S. Slussarenko
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