Abstract
Photoirradiation of a thin film of a homopolymer of 4-methacryloyloxyazobenzene with linearly polarized visible light, followed by cell fabrication, was found to generate a homogeneous alignment of nematic liquid crystals. In contrast, no alignment regulation was attained when the cell fabrication is made before photoirradiation, suggesting that the photo-induced persistent reorientation of the azo-chromophore is disturbed by penetration of the liquid crytal molecules into the polymer film to enhance the randomization of the oriented azobenzene chromophores
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