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Deformation of a homeotropic nematic liquid crystal layer at oblique incidence of an ultrasonic wave

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Abstract

The change of orientation of a nematic liquid crystal layer and the associated optical effect under an obliquely incident ultrasonic wave are considered. The theoretical analysis is performed under the assumption that the acoustic flows caused by convective stress in the boundary layers are responsible for the orientation effects in the nematic liquid crystal layer. An analytical description of the acoustooptic effect is developed for low ultrasonic frequencies, and for high frequencies, a numerical calculation is performed. It is demonstrated that the theoretical results agree both qualitatively and quantitatively with experimental data. The hypothesis that the effect produced by ultrasound on nematic liquid crystals is caused by the relatively strong elastic anisotropy of these crystals is analyzed.

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  1. Samara State University, ul. Akademika Pavlova 1, Samara, 443011, Russia

    E. N. Kozhevnikov

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  1. E. N. Kozhevnikov
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__________

Translated from Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 51, No. 6, 2005, pp. 795–801.

Original Russian Text Copyright © 2005 by Kozhevnikov.

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Kozhevnikov, E.N. Deformation of a homeotropic nematic liquid crystal layer at oblique incidence of an ultrasonic wave. Acoust. Phys. 51, 688–694 (2005). https://doi.org/10.1134/1.2130900

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