绿敏聚乙烯醇/丙烯酰胺体系光致聚合物的配方优化及全息存储特性  

Recipe Optimization and Holographic Storage Characteristics of Green Sensitive Polyvinyl Alcohol/Acrylamide-Based Photopolymer

作　　者：段晓亚[1] 朱建华[1] 魏涛[1] 陈倩倩[1] 魏乃科[1] 

机构地区：[1]四川大学物理科学与技术学院,四川成都610064

出　　处：《中国激光》2009年第4期983-988,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(60678044)资助课题

摘　　要：采用低分子量成膜剂、补充单体及多种光敏剂,开展了绿敏聚乙烯醇/丙烯酰胺体系光致聚合物的吸收光谱测试、染料浓度及膜层厚度优化研究,获得了高衍射效率及感光灵敏度的绿敏光致聚合物全息记录材料。实验仅需20 mJ/cm^2的曝光量即可获得82%的衍射效率,最大衍射效率可达92%以上。测试了该材料的角度选择性,对应的布拉格选择角宽度约为0.57°;开展了角度复用和空间复用全息存储实验,获得了清晰明亮的全息存储样品。By employing film-forming polymer with low molecular weights, supplementary monomers and different photosensitive reagents, a green sensitive polyvinyl alcohol/acrylamide based photopolymer with high diffraction efficiency and photosensitivity is reported, the absorption spectra, the effects of dye concentration and film thickness on diffraction efficiency and photosensitivity are studied systematically. Diffraction efficiency higher than 82% is obtained at the exposure level of 20 mJ/cm^2, maximum diffraction efficiency can reach to 92%. Furthermore, the angular selectivity of the photopolymer is also tested and its corresponding Bragg selective angle width is 0.57°. The preliminary applications of angular and spatial multiplexing holographic storage are also demonstrated, bright and distinct holographic storage samples are obtained readily.

关 键 词：全息记录材料 光致聚合物 全息存储 感光灵敏度 衍射效率 

分 类 号：O438.1[机械工程—光学工程]