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Femtosecond Two-Photon Detachment of Cu- Studied By PhotoelectronImaging
Ben-kang Liu,Yan-qiu Wang,Li Wang*
Author NameAffiliationE-mail
Ben-kang Liu Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China  
Yan-qiu Wang Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China  
Li Wang* Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China Liwangye@dicp.ac.cn 
Abstract:
The wavelength dependence of photoelectron angular distributions (PADs) of two-photon de-tachment of Cu- has been directly studied by using the photoelectron map imaging. Results show that for the laser field intensity of 6.0×1010 W/cm2, 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.
Key words:  Femtosecond, Two-photon detachment, Photoelectron velocity imaging, Cu-
FundProject:
用光电子成像技术研究Cu-的飞秒双光子光脱附过程
刘本康,王艳秋,王利*
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6.0×1010 W/cm2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.
关键词:  飞秒,双光子脱附,光电子成像,Cu-
DOI:10.1063/1674-0068/27/02/125-130
分类号: