| 用光电子成像技术研究CU^-的飞秒双光子光脱附过程 |
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| 引用本文： | 刘本康,王艳秋,王利.用光电子成像技术研究CU^-的飞秒双光子光脱附过程[J].化学物理学报(中文版),2014(2):125-130. |
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| 作者姓名： | 刘本康 王艳秋 王利 |
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| 作者单位： | 中国科学院大连化学物理研究所,大连116023 |
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| 基金项目： | ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.21073188）. |
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| 摘 要： | 用光电子成像技术研究了Cu^-的飞秒双光子光脱附过程．光脱附产生的光电子能量分布和角度分布通过光电子成像直接获得．实验发现，在光强为6．0×10^10W／cm^2下，双光子光脱附通道的光电子角度分布随激光波长出现剧烈的变化．通过低阶微扰理论和实验结果对比分析，Cu^-的双光子脱附产生的光电子角度分布特征可以归结于脱附过程中Cu^-的s和d轨道波函数之间的干涉效应．通过分析光电子角度分布特征，获得了不同波长下s和d轨道波函数对双光子脱附过程的贡献，该结果符合Wigner阈值理论的预期．
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| 关 键 词： | 飞秒 双光手脱附 光电子成像 Cu^- |
Femtosecond Two-Photon Detachment of Cu^- Studied By Photoelectron Imaging |
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| Ben-kang Liu,Yan-qiu Wang,Li Wang.Femtosecond Two-Photon Detachment of Cu^- Studied By Photoelectron Imaging[J].化学物理学报(中文版),2014(2):125-130. |
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| Authors: | Ben-kang Liu Yan-qiu Wang Li Wang |
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| Institution: | ( Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China) |
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| Abstract: | The wavelength dependence of photoelectron angular distributions （PADs） of two-photon detachment of Cu^- has been directly studied by using the photoelectron map imaging. Results show that for the laser field intensity of 6.0×10^10W/cm^2, PADs exhibit dramatic change with the external field wavelength. Comparison between the experimental observation and the lowest-order perturbation theory prediction indicates that the pattern of PADs can be explained by the interference of the s and d partial waves in the final state. Relative contri- butions of s and d partial waves in the two-photon detachment at different laser wavelengths are obtained. |
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| Keywords: | Femtosecond Two-photon detachment Photoelectron velocity imaging Cu^- |
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