TITLE

Backflow in the relaxation of a hybrid aligned nematic cell

AUTHOR(S)
Jewell, S. A.; Sambles, J. R.
PUB. DATE
May 2003
SOURCE
Applied Physics Letters;5/12/2003, Vol. 82 Issue 19, p3156
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The optical convergent-beam technique has been used to measure the changing director profile in a 4.6 μm ZLI-2293 filled hybrid aligned nematic cell when a 7 V[SUBrms] ac voltage was removed. The relaxation process has been recorded in 0.3 ms time steps allowing the detailed director backflow occurring in the initial 9 ms of the reorientation process to be quantified. The measured tilt profiles over the 60 ms total relaxation period were compared to model tilt profiles produced using the Leslie--Eriksen--Parodi theory, and excellent agreement was found. Further analysis shows that the backflow is dominated by the viscosity coefficient &neta;[SUB1] and the overall relaxation is governed by the coefficient γ[SUB1].
ACCESSION #
9697778

 

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