Article ID Journal Published Year Pages File Type
1537197 Optics Communications 2010 4 Pages PDF
Abstract

This study investigates the beam profile and the liquid crystal (LC) arrangement affected by an optical field on LC thin films at a temperature close to nematic–isotropic phase transition temperature (TNI). A combined microscopic and conoscopic technique was used in experiments as a convenient way to analyze the optical nonlinearity that is associated with the molecular configuration of nematic liquid crystal (NLC). An optical field combined with thermal enhancement enhances molecular reorientation and causes additional molecular excitation along the axis of propagation of the beam. The reorientational nonlinearity yields an undulating structure with multi-foci; the length between each pair of foci increases with time, as described.

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Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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