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共轭有机高聚物PPQ薄膜的双光子吸收
引用本文:刘建华,朱鹤元,胡谊梅,孙迭篪,李富铭,孙猛.共轭有机高聚物PPQ薄膜的双光子吸收[J].光学学报,2000,20(11):570-1574.
作者姓名:刘建华  朱鹤元  胡谊梅  孙迭篪  李富铭  孙猛
作者单位:1. 复旦大学物理系,三束材料改性国家重点实验室复旦大学分部,上海,200433
2. 复旦大学高分子科学系,上海,200433
基金项目:国家自然科学基金!(项目批准号 :1980 4 0 0 3),复旦大学青年基金!( CH12 2 2 2 )资助项目
摘    要:在 532 nm波长处测量了共轭高聚物 PPQ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。其非线性折射率系数 n2 ≈ 9. 5× 10 -10 esu,认为这是双光子激发的纯电子响应。并对材料的品质因素进行了评估。

关 键 词:共轭高聚物  Z-扫描  PPQ薄膜  双光子吸收
收稿时间:1999/4/19

Two Photon Absorption in PPQ Conjugated Polymer Film
Liu Jianhua,Zhu Heyuan,Hu Yimei,Sun Diechi,Li Fuming,Sun Meng.Two Photon Absorption in PPQ Conjugated Polymer Film[J].Acta Optica Sinica,2000,20(11):570-1574.
Authors:Liu Jianhua  Zhu Heyuan  Hu Yimei  Sun Diechi  Li Fuming  Sun Meng
Abstract:Measurements on the third order optical nonlinearities of the conjugated polymeric cast film of PPQ (polyphenylquinoxalines) were performed at 532 nm wavelength using a frequency doubled mode-locked Nd:YAG laser with 10 Hz repetition rate. Strong two-photon absorption coefficient β=0.59 cm/MW was obtained for PPQ. The measured nonlinear refractive index coefficient n2≈9.5×10-10 esu, was in agreement with the previously reported value. It was attributed to a purely electronic response for the optical nonlinearity, and the figure of merit of PPQ was assessed.
Keywords:conjugated polymer    ultrafast optical nonlinearity    Z  scT  
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