Optical response of a nematic liquid crystal cell at splay-bend transition: model and dynamic simulation

Details Optical response of a nematic liquid crystal cell at splay-bend transition: model and dynamic simulation Optical response of a nematic liquid crystal cell at splay-bend transition: model and dynamic simulation

2004-07-25

arxiv.org/abs/cond-mat/0407647v1

Liquid Crystals 32, No 6, 699-706 (2005)

Physics

Condensed Matter

Materials Science

uses revtex4, 14 pages, 10 figures

Scientific paper

We study dynamical optical response of a nematic liquid crystal cell that undergoes the splay-bend transition after applying the voltage across the cell. We formulate a simplified model that takes into account both the flexoelectric coupling and the surface rotational viscosity. The dynamic equations of the model were solved numerically to calculate temporal evolution of the director profile and the transmittance. We evaluate the response time as a function of a number of parameters characterising dielectric and elastic anisotropies, asymmetry of the surface pretilt angles, anchoring energy, surface rotational viscosity and flexoelectricity.

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