| 激子-声子相互作用对三阶非线性光学性质的影响 |
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| 引用本文： | 姚鸣,朱卡的,袁晓忠,蒋逸文,吴卓杰.激子-声子相互作用对三阶非线性光学性质的影响[J].光学学报,2006,26(4):05-610. |
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| 作者姓名： | 姚鸣 朱卡的 袁晓忠 蒋逸文 吴卓杰 |
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| 作者单位： | 1. 宁夏大学物理电气信息学院,银川,750001
2. 上海交通大学物理系,上海,200030 |
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| 基金项目： | 中国科学院资助项目
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国家自然科学基金 |
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| 摘 要： | 在对激子不作任何近似的条件下,对强耦合激子声子系统中非线性光学性质在理论上进行了研究,结果表明当信号光场频率与激子频率的失谐量等于光学声子的频率时,系统的非线性光学吸收和克尔系数显著增大,从而证明了激子声子的强相互作用对介质的非线性光学性质的影响相当大。并且,与对激子作代松马利夫(Dyson-Maleev)变换近似和玻色近似的结果进行仔细的比较,发现对激子不作近似时,这种影响将进一步增大。
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| 关 键 词： | 非线性光学 克尔系数 激子 光学声子 |
| 文章编号： | 0253-2239（2006）04-0605-5 |
| 收稿时间： | 2005-06-22 |
| 修稿时间： | 2005-09-16 |
Effects of Exciton-Phonon Interaction on Third-Order Nonlinear Optical Properties |
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| Yao Ming,Zhu Kadi,Yuan Xiaozhong,Jiang Yiwen,Wu Zhuojie.Effects of Exciton-Phonon Interaction on Third-Order Nonlinear Optical Properties[J].Acta Optica Sinica,2006,26(4):05-610. |
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| Authors: | Yao Ming Zhu Kadi Yuan Xiaozhong Jiang Yiwen Wu Zhuojie |
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| Institution: | 1. School of Physics and Etectricat Information Science, Ningxia University, Yinchuan 750001; 2. Department of Physics, Shanghai Jiao Tong University, Shanghai 200030 |
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| Abstract: | The nonlinear optical properties of the strongly coupled exciton-phonon systems are investigated theoretically without making any approximation for excitons.It is shown that the nonlinear optical absorptions and Kerr coefficients are enhanced significantly as the frequency detuning value of the signal field and the excition is equal to the phonon frequency,which makes clear that the strong excition-phonon interaction affects the nonlinear optical properties of the medium greatly.The numerical results and the detailed comparison also indicate that the nonlinear optical absorptions and Kerr coefficients are further magnified without making Bose approximation and the Dyson-Maleev approximation for excitons. |
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| Keywords: | nonlinear optics Kerr coefficient exciton optical phonon |
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