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A Modified Langevin-Debye Model For Investigating The Electro-Optic Behaviour Of De Vries Smectic Liquid Crystals, Vigneshwaran Swaminathan, Vitaly Petrovich Panov, Sithara Pavithran Sreenilayam, Yuri Panarin, J. K. Vij
A Modified Langevin-Debye Model For Investigating The Electro-Optic Behaviour Of De Vries Smectic Liquid Crystals, Vigneshwaran Swaminathan, Vitaly Petrovich Panov, Sithara Pavithran Sreenilayam, Yuri Panarin, J. K. Vij
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An external electric field applied across a planar-aligned cell in Smectic A* phase of de Vries smectic liquid crystal induces director redistribution over a cone, resulting in a substantial increase in the birefringence and the apparent optical tilt angle. Such an electro-optic response is modelled by Shen et al. [Y. Shen et al., Phys. Rev. E 88, 062504 (2013)], who modified their previous hollow cone with a diffuse cone model by introducing the molecular distribution function limited over a range of tilt angles, that lie in between θmin and θmax. The limits in these two tilt …