Orientational ordering of a liquid crystal on a photoaligned AZO-polyimidesubstrate

We have studied a method of pretilting liquid crystal on the surface of a s ubstrate by photoaligning the polyimide substrate containing azo type chrom ophores. The liquid crystal molecules were pretilted by inducing anisotropy in the cell substrate with anisotropic photopumping of the chromophores. U sing the crystal rotation method, we have investigated the orientational or dering of 5CB liquid crystal on a photoaligned azo-polyimide substrate.