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Photopolymers are increasingly interesting as new materials for the fabrication of electro optical liquid crystal devices. Photoinduced surface relief gratings in dry, self developing acrylamide based photopolymers can be used to align liquid crystals (LCs) as an alternative to the rubbing technique. These optically recorded surface relief patterns can be used to fabricate electro-optical switchable LC Bragg gratings. An investigation of the dependence of photoinduced surface relief gratings on recording intensity and thickness of the photopolymer layer is reported. The surface relief gratings were filled with E7 LCs and a switchable LC diffraction grating was fabricated.
Kotakonda, P., Naydenova, I., Martin, S., Toal, V.: Characterization of an Acrylamide Based Photopolymer for Fabrication of Liquid Crystal Devices. Proceeding of International conference on Materials Energy and Design, DIT, 2006, 369-379.