吡咯俘精酸酐的光致各向异性研究  

Photoinduced Anisotropy in Pyrrylfulgide/PMMA Film

作　　者：门克内木乐[1] 姚保利[1] 王英利[1] 郑媛[1] 雷铭[1] 董卫斌[1] 陈国夫[1] 陈懿[2] 樊美公[2] 韩勇[2] 孟宪娟[2] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学技术国家重点实验室,西安710068 [2]中国科学院物理化学技术研究所,北京100101

出　　处：《光子学报》2004年第5期581-584,共4页Acta Photonica Sinica

基　　金：国家自然科学基金 (批准号 :6 0 3370 2 0 ) ;国家重点研究计划"973"(批准号 :G1 9990 330 0 4 );中国科学院创新方向性研究(4 0 0 0 1 0 4 3)资助项目

摘　　要：将有机光致变色化合物—吡咯取代俘精酸酐掺杂于PMMA中形成薄膜 在紫外光照射下 ,薄膜由无色态转换为呈色态 用 6 5 0nm线偏振激光照射薄膜 ,在由呈色态转变为无色态时产生光致各向异性 对 6 33nm的探测光具有正单轴晶体特性 ,光轴方向平行于激发光振动方向 ,光致二向色性率 (D⊥ -D∥)可达 0 .2 ,光致双折射率 (n∥ -n⊥)可达 2× 1 0 - 3 实验还测量了光致各向异性与曝光量的特性曲线 ,发现最佳曝光量为 1 3～ 2 0J/cm2 ,理论分析了其原因A new organic photochromic compound pyrrylfulgide is prepared as a film in PMMA. Under UV light, the film converts from the bleach state into colored state. After the irradiation of linearly polarized 650 nm light, the film shows the characteristic of the positive uniaxial crystal at 633 nm, the optical axis is parallel to the vibration direction of the exciting light beam, and the photoindused dichroism (D ⊥-D ∥) is above 0.2, and the photoinduced birefringence (n ∥-n ⊥) is 2×10 -3 . From the changing curve of the photoinduced anisotropy with the exposal, the best exposure scale 13～20 J/cm 2 was found, and the reason was theoretically analyzed. These results have given the experimental data for the fulgides to be used in the optical information processing.

关 键 词：俘精酸酐 光致各向异性 光致双折射 光致二向色性 光致变色 

分 类 号：O484.41[理学—固体物理]