利用偏振光控制的光学转换新方法  

POLARIZATION DEPENDENT ENHANCEMENT/RESTRAINT OPTICAL CONVERSION IN AZOBENZENE DOPED POLYMER FILM

作　　者：杨庆鑫[1] 张娅娜[1] 魏振乾[1] 孙桂娟[1] 李峰[2] 

机构地区：[1]吉林大学物理系,长春130023 [2]吉林大学化学系,长春130023

出　　处：《光子学报》2000年第12期1073-1076,共4页Acta Photonica Sinica

基　　金：国家自然科学基金资助项目(597905001)

摘　　要：报道了一种新的非相干 -相干光学转换方法 ,该方法利用了偏振光对含偶氮材料中自衍射的增强和抑制作用 ,所用样品为具有较大光致双折射 (δn=1 .3× 1 0 - 2 )的偶氮掺杂聚合物薄膜 .研究结果表明 ,当泵浦光偏振方向与两束记录光垂直 /平行时 ,衍射效率得到了极大的增强 /抑制 .A new optical conversion based on polarization dependent optical enhancement/restraint in self diffraction (PDOESD/PDORSD) is reported.The employed sample is an azobenzene doped polymer film,which possesses large magnitude of photo induced birefringence:δn=1.3×10 -2 .The extreme PDOESD/PDORSD was performed when the polarization of exciting laser was perpendicular/parallel to that of the two coherent recording beams.Both positive and negative replicas of incident image were obtained by means of this optical conversion technique.

关 键 词：偶氮掺杂聚合物 光致双折射 自衍射 偏振增强/抑制 光学转换 

分 类 号：O631.24[理学—高分子化学] O437[理学—化学]