Dynamic of Surface-Mediated Director Reorientation in a Cell with Dye Doped Liquid Crystal

We report on investigation of a light-induced anchoring of dye-doped liquid crystal(LC)in nematic phase. Contributions of light-induced dye adsorption and desorption processes as well as of the bulk-induced reorientation effect were separated by choosing specific geometries of the light irradiation. We propose a model that explains peculiarities of light-induced easy axis producing in nematic phase which differs from one in isotropic phase due to presence of anisotropic dark-adsorbed layer and effective bulk-induced director reorientation.