| 激光波长对双色激光等离子体产生太赫兹波的影响 |
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| 引用本文： | 陈泽优,范文慧,陈徐,丁玲,宋超.激光波长对双色激光等离子体产生太赫兹波的影响[J].光子学报,2017,46(12). |
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| 作者姓名： | 陈泽优 范文慧 陈徐 丁玲 宋超 |
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| 作者单位： | 1. 中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安710119;中国科学院大学,北京100049;2. 中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,西安,710119 |
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| 基金项目： | 国家自然科学基金，中国科学院百人计划项目，中国科学院知识创新项目，The National Natural Science Foundation，the Hundreds of Talents Programs of the Chinese Academy of Sciences，the Innovative Project of the Chinese Academy of Sciences |
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| 摘 要： | 基于瞬态光电流模型研究了激光波长对双色激光等离子体产生太赫兹波的影响.通过理论计算证明:太赫兹信号随激光波长的增大而增强,其变化趋势不会因为双色激光强度、脉宽、相位差、强度比的变化而改变;太赫兹波的频谱不会因为激光波长的改变发生变化.分析了双色激光波长影响太赫兹辐射强度的原因,并利用自由电子密度和漂移电流密度阐明了该影响的内在物理机制.
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| 关 键 词： | 太赫兹波 等离子体 光电流模型 激光波长 自由电子 漂移电流 |
Effect of Two-color Laser Wavelength on Intense Terahertz Generation |
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| CHEN Ze-you,FAN Wen-hui,CHEN Xu,DING Ling,SONG Chao.Effect of Two-color Laser Wavelength on Intense Terahertz Generation[J].Acta Photonica Sinica,2017,46(12). |
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| Authors: | CHEN Ze-you FAN Wen-hui CHEN Xu DING Ling SONG Chao |
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| Abstract: | The effect of the two-color laser wavelength on intense terahertz generation was studied based on the transient photocurrent model.Theoretical calculation proves that the terahertz signal will increase with the increase of laser wavelength,and this trend will not vary with the variation of the pulse intensity,the pulse duration,the laser phase and the intensity ratio of the two-color laser.The distribution of terahertz spectrum will not change with the variation of the laser wavelength.Furthermore,the influence of laser wavelength on terahertz generation is analyzed,and the physical mechanism of this effect is explained by the free electron density and the drift current density. |
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| Keywords: | Terahertz waves Plasma Transient photocurrent model Laser wavelength Free electron Drift current |
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