Molecular Crystals and Liquid Crystals

Optical Control of the Alignment of a Liquid Crystal in the Smectic A Phase

Abstract:

The possibility to regulate the texture of a liquid crystal in the smectic A phase with the help of a photosensitive substrate was investigated. It is shown that the light-induced realignment of the director configuration can persist in a nematic-smectic A phase transition and cause rearrangement of the smectic layers within the illuminated area. The ratio between the azimuthal anchoring strengths on the photosensitive and rubbed polyimide plates is estimated.

LC Alignment Controlled by Photoordering and Photorefraction in a Command Substrate

Molecular Crystals and Liquid Crystals

Analytic 4 × 4 Propagation Matrices for Linear Optical Media

Abstract:

A new and efficient 4 × 4 matrix formalism for light propagation in general linear optical media such as lossy biaxial and optically active materials is developed. The propagation of light is described in terms of the amplitudes of the four propagating modes. Closed form analytic expressions are obtained for the 4 × 4 propagation matrices, based on exact solutions for the eigenmodes in general linear media.

LC Alignment Controlled by Photoordering and Photorefraction in a Command Substrate