光学学报, 2003, 23 (4): 501, 网络出版: 2006-06-27
新型偶氮苯侧链共聚物的超快光致双折射特性
The Ultrafast Photo-Induced Birefringence of a New Kind Azobenzene Side-Chain Polymer
光电材料 偶氮苯侧链共聚物 超快光致双折射 光致异构 optoelectronic material azobezene side-chain polymer ultrafast photo-induced birefringence photo-induced isomerization
摘要
采用抽运探测方法测量了一种新型的含4 偶氮苯 4′ 偶氮苯酚侧链的共聚物(DAP PGMA)的光致异构特性。实验结果表明DAP PGMA比含单偶氮苯侧链共聚物P(MMA co MAZ)有较大的光致双折射效应,Δn～6.60×10 -4;同时DAP PGMA比P(MMA co MAZ)具有更快的开启速度,光致向向异性上升时间为40 ps,这种皮秒量级的快过程对应于双偶氮苯生色团的顺反异构过程。
Abstract
The photo-induced anisotropy property of a new kind azobezene side-chain polymer [4(4′-phenylazo)-poly(glycidylmethacrylate),DAP-PGMA] is measured with pump-probe technique. A larger photo-induced birefringence of Δn 6.60×10 -4 and a much shorter rise time of 40 ps than those of P (MMA-CO-MAZ) are obtained in DAP-PGMA. The picosecond process is attributed to the trans-cis isomerization.
黄亚萍, 王惠, 文锦辉, 刘智刚, 赵福利, 林位株, 王坚, 梁兆熙. 新型偶氮苯侧链共聚物的超快光致双折射特性[J]. 光学学报, 2003, 23(4): 501. 黄亚萍, 王惠, 文锦辉, 刘智刚, 赵福利, 林位株, 王坚, 梁兆熙. The Ultrafast Photo-Induced Birefringence of a New Kind Azobenzene Side-Chain Polymer[J]. Acta Optica Sinica, 2003, 23(4): 501.
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