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.
出处
《光子学报》
EI
CAS
CSCD
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)
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
Azobenzene doped polymer
Photoinduced birefringence
Self diffraction
Polarization dependent enhancement/restraint
Optical conversion
