共轭有机高聚物PPQ薄膜非线性吸收的Z-扫描测量  

Z-scan Measurement on the Third-order Nonlinear Optical Absorption of Conjugated PPQ Polymer Film

作　　者：黄金荣[1] 刘建华 朱鹤元 胡谊梅 孙迭篪 李富铭[1] 孙猛[2] 

机构地区：[1]三束材料改性国家重点实验室复旦大学分部,复旦大学物理系上海200433 [2]复旦大学高分子科学系,上海200433

出　　处：《中国激光》2000年第12期1118-1122,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金! (批准号 :1980 4 0 0 3);国家博士后基金;复旦大学青年基金

摘　　要：用 Z-扫描方法在 532 nm波长测量了共轭高聚物 PPQ( polyphenylquinoxalines)薄膜的三阶光学非线性参数 ,发现其较强的非线性 (双光子 )吸收系数β≈ 0 .59cm/ MW。同时得到 Kerr系数n2 ≈ 9.5× 10 -10 esu,与用其他方法的测量结果较好地吻合。Measurements on the third order optical nonlinearities of the conjugated polymeric cast film of PPQ (polyphenylquinoxalines) were performed based on the so called Z-scan method using a frequency doubled mode-locked Nd∶YAG laser with low repetition rate. The nonlinear absorptive coefficient β=0.59 cm/MW, was obtained for PPQ, in addition, the measured nonlinear refractive index coefficient γ=2.4×10 -12 cm2/W was in a good agreement with the previously reported value.

关 键 词：共轭高聚物 有机高聚物 Z-扫描测量 PPQ薄膜 

分 类 号：O484.4[理学—固体物理]