| 基于GaSe和ZnGeP2晶体差频产生可调谐太赫兹辐射的理论研究 |
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| 引用本文： | 刘 欢,徐德刚,姚建铨.基于GaSe和ZnGeP2晶体差频产生可调谐太赫兹辐射的理论研究[J].物理学报,2008,57(9):5662-5669. |
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| 作者姓名： | 刘 欢 徐德刚 姚建铨 |
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| 作者单位： | (1)天津大学精仪学院激光与光电子研究所，天津 300072; (2)天津大学精仪学院激光与光电子研究所，天津 300072；清华大学精密仪器与机械学系，北京 100084 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(批准号：2007CB310403)和天津市应用基础及前沿技术研究计划一般项目(光学与电子学)(批准号：07JCYBJC06200)资助的课题. |
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| 摘 要： | 基于非线性光学频率变换理论，采用已报道的利用非线性光学差频方法产生可调谐太赫兹波的实验条件作为理论分析的实验模型，计算模拟出在不同相位匹配条件下，GaSe和ZnGeP2晶体差频的相位匹配角、走离角、允许角和有效非线性系数，并对计算结果进行了分析比较，总结出对应输出不同太赫兹波长的最佳相位匹配方式.计算结果为利用非线性晶体差频产生可调谐太赫兹辐射的实验研究提供深入和全面的理论基础.
关键词：
太赫兹波
GaSe晶体
2晶体')" href="#">ZnGeP2晶体
差频
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| 关 键 词： | 太赫兹波 GaSe晶体 ZnGeP2晶体 差频 |
| 收稿时间： | 2007-11-26 |
Theoretical study of tunable terahertz radiation based on difference-frequency generation in GaSe and ZnGeP2 crystals |
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| Liu Huan,Xu De-Gang and Yao Jian-Quan.Theoretical study of tunable terahertz radiation based on difference-frequency generation in GaSe and ZnGeP2 crystals[J].Acta Physica Sinica,2008,57(9):5662-5669. |
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| Authors: | Liu Huan Xu De-Gang and Yao Jian-Quan |
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| Abstract: | Based on the theory of nonlinear optical frequency conversion, the phase-match angle, walk-off angle, acceptance angle and effective nonlinear coefficient of difference-frequency in GaSe and ZnGeP2 crystals are calculated under different phase-matched conditions. In the theoretical simulation, the experimental parameters which were reported to generate widely tunable terahertz waves by nonlinear optical difference-frequency method are adopted. The optimum phase-matched conditions corresponding to different terahertz wave bands are summarized through comparing the whole calculated results. The calculated results provide a sound and comprehensive theoretical basis for using optical difference-frequency method to generate tunable terahertz wave in the nonlinear crystals. |
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| Keywords: | terahertz wave GaSe crystal ZnGeP2 crystal difference-frequency |
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