Keywords
nematic layers
electric field induced deformations
How to Cite
Abstract
The deformations of homeotropic nematic layers induced by ac electric field of frequency f were studied numerically. Two kinds of nematic liquid crystals with small negative dielectric anisotropy, De < 0, were considered: (i) the non-flexoelectric nematic, (ii) the nematic characterised by the positive sum of flexoelectric coefficients e = e11 + e33 > 0. It was found that at sufficiently low frequencies, the deformations varied with time. The deformations of purely dielectric nature had the period 1/(2f). The time period of flexoelectric distortions was equal to 1/f. The influence of rotational viscosity and of thickness of the layer on the dynamics of deformations was analysed.
References
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