| 飞秒激光脉冲与金属光阴极相互作用 |
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| 引用本文： | 刘运全,张杰,梁文锡. 飞秒激光脉冲与金属光阴极相互作用[J]. 中国物理, 2005, 14(8): 1671-1675 |
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| 作者姓名： | 刘运全 张杰 梁文锡 |
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| 作者单位： | Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 基金项目： | Project supported by the National Natural Foundation of China (Grant Nos 10374116, 60321003, 10390161) and BKBRSF (Grant No G1999075206). |
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| 摘 要： | 本文从理论上分析了飞秒激光与光阴极相互作用过程，采用双温模型分析了飞秒激光脉冲辐照下金属薄膜的温度效应。通过建立一个简单的光电效应模型，获得了最佳的金属光阴极厚度，通过该模型可以发现，产生的光电流对在飞秒激光脉冲辐照下的电子温度和晶格温度有着很大的依赖关系。
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| 关 键 词： | 飞秒激光；光阴极；超短电子脉冲；时间分辨电子显微镜 |
| 收稿时间： | 2004-12-16 |
Interaction of femtosecond laser pulses with metal photocathode |
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| Liu Yun-Quan,Zhang Jie and Liang Wen-Xi. Interaction of femtosecond laser pulses with metal photocathode[J]. Chinese Physics, 2005, 14(8): 1671-1675 |
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| Authors: | Liu Yun-Quan Zhang Jie Liang Wen-Xi |
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| Affiliation: | Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The features of interaction of femtosecond laser pulses with photocathode are studied theoretically in this paper. The surface temperature of the metal cathode film while femtosecond laser pulses irradiation is studied with two-temperature model. With a simple photoelectric model we obtain theoptimum metal film thickness for the back-illuminated photocathode. The generated ultrashort photocurrent pulses are strongly dependent on the temperature of the electron gas and the lattice during the femtosecond laser pulse irradiation on the photocathode. |
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| Keywords: | femtosecond laser photocathode ultrashort electron pulse time resolved electron microscopy |
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