偶氮聚合物表面起伏光栅用于液晶定向研究  

SURFACE RELIEF GRATINGS USED AS LIQUID CRYSTAL ALIGNMENT LAYER

作　　者：和亚宁[1] 任鸿烽[1] 石琳[1] 王晓工[1] 

机构地区：[1]清华大学材料科学与工程研究院化工系高分子研究所,北京100084

出　　处：《高分子学报》2004年第4期617-619,共3页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目 (基金号 5 0 2 73 0 18)

摘　　要：With interfering illumination of Ar++ laser beams (488 nm),surface relief gratings (SRGs) were photo-inscribed on epoxy-based azo polymer (BP-AZ-CN) films.The modulation depth was about 160 nm and the spatial period was about 670 nm.The quartz slides covered with SRG films were assembled to liquid crystal (LC) cell to study the LC alignment behavior.Homogeneous liquid crystal alignment was observed in the surface relief gratings regions of the LC cell.Alignment of LC molecules was monitored by measuring the transmittance passing through the cell between crossed polarizers as a function of the angle of the cell rotating around the experiment optical axis.The transmittance changed periodically with a regular 90° separation of the rotational angle and the pretilt angle of the cell was found to be 3.2°.This alignment technique could have useful applications in the future LC displays.With interfering illumination of Ar+ laser beams (488 nm) surface relief gratings (SRGs) were photo-inscribed on epoxy-based azo polymer (BP-AZ-CN) films. The modulation depth was about 160 nm and the spatial period was about 670 nm. The quartz slides covered with SRG films were assembled to liquid crystal (LC) cell to study the LC alignment behavior. Homogeneous liquid crystal alignment was observed in the surface relief gratings regions of the LC cell. Alignment of LC molecules was monitored by measuring the transmittance passing through the cell between crossed polarizers as a function of the angle of the cell rotating around the experiment optical axis. The transmittance changed periodically with a regular 90degrees separation of the rotational angle and the pretilt angle of the cell was found to be 3.2degrees. This alignment technique could have useful applications in the future LC displays.

关 键 词：偶氮聚合物 表面起伏光栅 液晶定向技术 液晶显示 

分 类 号：O753.2[理学—晶体学]