温度对全息聚合物分散液晶光栅形貌及电光特性的影响

Influence of Temperature on HPDLC Grating Characteristics

采用光敏预聚物、向列相液晶和光引发剂混合物体系,在不同温度条件下制备全息光栅.利用红外光谱、光学显微镜、He-Ne激光器对预聚物和光栅进行测试.实验结果表明,光栅的衍射效率随制备温度的升高先增加后减小.对实验结果进行分析,发现它与光聚合反应体系的特性有很好的对应关系,同时深入探讨了制备温度对光栅形貌及电光特性的影响.

Holographic gratings, using the system made of photosensitive pre-polymer monomers, nematic liquid crystal and photoinitiator mixtures,were fabricated under various curing temperatures. The samples were checked up by IR spectra, tical microscope and He-Ne laser. The results indicate that diffraction efficiencies of grating increased first, then decreased along with curing temperature hoists. These results were analyzed, and were found to have a good correlation with characteristics of system. The relation between temperature and diffraction was discussed.