全息聚合物弥散液晶材料衍射特性的优化  

Optimization of diffraction properties for holographic polymer dispersed liquid crystal

作　　者：张斌[1] 刘言军[1] 贾瑜[2] 徐克璹[1] 

机构地区：[1]复旦大学先进光子材料与器件国家重点实验室,光科学与工程系,上海200433 [2]复旦大学化学系,上海200433

出　　处：《物理学报》2003年第1期91-95,共5页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :60 0 770 0 3 );和上海市科学技术发展基金 (批准号 :0 12 2 610 0 9)资助的课题~~

摘　　要：研究了影响全息聚合物弥散液晶 (HPDLC)衍射效率的主要因素 ,分析了衍射效率与聚合物单体的选择、曝光强度、曝光时间、液晶含量及温度的依赖关系 ,从而找到最佳条件 ,使衍射特性得到优化 .目前测得的最大衍射效率为 80 2 % .实验中还研究了扫描电镜 (SEM)Holographic polymer-dispersed liquid crystal. (HPDLC) is a kind of switchable volume holography. It can be manufactured according to the photo-initiated polymerization-induced phase separation. HPDLC is composed of parallel, periodic polymer-rich and liquid crystal-rich planes. The diffraction efficiency can be modulated by the application of electric field. HPDLC devices are potentially useful for optical communication, information storage and display. How to increase the diffraction efficiency is the key to application. We investigated the dependence of diffraction efficiency on the refractive index of the polymer, exposure intensity, liquid crystal loading and temperature. The best conditions were found to make the diffraction properties optimized. Now the highest diffraction efficiency was 80.2%. The HPDLC morphologies were also observed and analyzed by scanning electron microscope (SEM).

关 键 词：全息聚合物弥散液晶 衍射效率 相分离 表面表貌 

分 类 号：O753.2[理学—晶体学] TN104.3[电子电信—物理电子学]