| 聚合物非醚PPQ三阶非线性光学系数的激发态增强 |
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| 引用本文： | 颜军,孙猛.聚合物非醚PPQ三阶非线性光学系数的激发态增强[J].光学学报,1995,15(8):019-1023. |
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| 作者姓名： | 颜军 孙猛 |
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| 作者单位： | 三束材料改性国家重点联合实验室复旦大学分部，复旦大学物理系，复旦大学高分子科学系 |
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| 摘 要： | 用皮秒时间分辨的双波耦合方法研究了有机高聚物非醚的三阶非线性光学增强。在激发效率未饱和的情况下观察到材料的有效三阶超极化率γ增强两倍。与激发荧光实验相结合，验证了γ的激发增强与激发态粒子布居数成线性关系；并用三能级模型解释了实验观测到的激发态增强的时间过程。
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| 关 键 词： | 聚合物 非线性光学 激发态 PPQ |
| 收稿时间： | 1994/7/8 |
Excited-State Enhancement of the Third-Order Nonlinear Optical Susceptibility of Non-Ether PPQ |
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| Yan Jun, Wu Jianyao, Zhu Heyuan, Zhang Xiaotian,Sun Diechi, Hu Yimei, Li Fuming.Excited-State Enhancement of the Third-Order Nonlinear Optical Susceptibility of Non-Ether PPQ[J].Acta Optica Sinica,1995,15(8):019-1023. |
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| Authors: | Yan Jun Wu Jianyao Zhu Heyuan Zhang Xiaotian Sun Diechi Hu Yimei Li Fuming |
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| Abstract: | Picosecond time-resolved two-wave coupling method is used to investigate the excited-state enhancement of the third-order nonlinear optical process of a organic polymer──non-ether PPQ (polyphenylquinoxalines). The enhancement factor of the material's effective third-order hyperpolarizability γ is observed to be 2 under the nonsaturable exciting condition, and excited fluorescence of non-ether PPQ was also examined. We verified that the excited-state enhancement of γ is proportional to the population of the population of the excited state, and explained the time process of the enhancement using three-level model. |
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| Keywords: | polymer nonlinear optics excited-state |
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