Molecular Crystals and Liquid Crystals, Vol.478, 959-966, 2007
Light-induced anchoring evolution in nematic phase of liquid crystal doped with azo-dye
We, report an experimental study of light-induced anchoring evolution of azo-dye-doped liquid crystal (LC) in nematic phase and present a model of this effect. To describe the experimental results we considered the gliding effect as a result of light-induced anisotropic adsorption/desorption of dye molecules on/from the boundary polymer aligning layer in the presence of light-induced bulk torque due to ordering of absorbing dye molecules. Our model qualitatively describes the observed drift of the light-induced easy axis.
Keywords:drift of the easy axis;dye-doped liquid crystal;light-induced adsorption and desorption;light-induced anchoring;nematic