Photoinduced Pattern Formation of Photo-Cross-Linkable polymer Liquid Crysta Film using Linearly Polarized UV Light

Abstract

We report here a pattern formation of polymer liquid crystal film by the use of linearly polarized ultraviolet (LPUV) light followed by annealing. A periodical pattern was appeared after annealing due to the periodic reorientation of the mesogenic groups induced by the anisotropic photo-cross-linking reaction. The orientational direction was parallel to the electric vector of the incident LPUV light. The pattern pitch was -10/μm and the diffraction pattern can be observed. The diffraction efficiency was dependent on the incident polarization plane of the light.