【摘要】 将光敏预聚物单体与向列相液晶按一定比例混合,注入液晶盒;采用光掩模法,在紫外灯照射下,使混合物产生定域光聚合反应,形成聚合物网络稳定液晶光栅。利用光学显微镜和He-Ne激光器进行测试,实验检测结果表明,该光栅具有周期性的栅结构,且衍射效率具有先增大后减小电场调制特性,并利用折射率调制机理对该现象进行分析。更多还原

【Abstract】 Photosensitive pre-polymer monomers are mixed together with nematic liquid crystal in certain ratio. Then the mixture is injected into cells. Phase separation between liquid crystal and pre-polymer monomers takes place when ultraviolet light is applied by the pattern photomask covering on the cells, which results in the formation of polymer network stabilized liquid crystal grating. The samples are checked up by optical microscope and He-Ne laser. The results indicate that the gratings have periodic grating structure and the diffraction efficiencies of grating increase first, then decrease along with electric field hoists. These results were analyzed based on theory of refractive index modulated.更多还原