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Role of XUV Photons in Atomic High-Order Above-Threshold Ionization Processes in IR+XUV Two-Color Laser Fields

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【作者】 张奎； 刘敏； 王兵兵； 郭迎春； 严宗朝； 陈京； 柳晓军；

【Author】 Kui Zhang;Min Liu;Bing-Bing Wang;Ying-Chun Guo;Zong-Chao Yan;Jing Chen;Xiao-Jun Liu;Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences;Department of Physics, East China Normal University;Department of Physics, University of New Brunswick;State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences;Center for Cold Atom Physics, Chinese Academy of Sciences;HEDPS, Center for Applied Physics and Technology, Peking University;Institute of Applied Physics and Computational Mathematics;

【机构】 Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences； Department of Physics, East China Normal University； Department of Physics, University of New Brunswick； State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences； Center for Cold Atom Physics, Chinese Academy of Sciences； HEDPS, Center for Applied Physics and Technology, Peking University； Institute of Applied Physics and Computational Mathematics；

【摘要】 We investigate the above-threshold ionization of an atom in a combined infrared(IR) and extreme ultraviolet(XUV) two-color laser field and focus on the role of XUV field in the high-order above-threshold ionization(HATI)process. It is demonstrated that, in stark contrast to previous studies, the XUV laser may play a significant role in atomic HATI process, and in particular, the XUV laser can accelerate the ionized electron in a quantized way during the collision between the electron and its parent ion. This process cannot be explained by the classical three-step model. Our results indicate that the previously well-established concept that HATI is an elastic recollision process is broken down.

【Abstract】 We investigate the above-threshold ionization of an atom in a combined infrared(IR) and extreme ultraviolet(XUV) two-color laser field and focus on the role of XUV field in the high-order above-threshold ionization(HATI)process. It is demonstrated that, in stark contrast to previous studies, the XUV laser may play a significant role in atomic HATI process, and in particular, the XUV laser can accelerate the ionized electron in a quantized way during the collision between the electron and its parent ion. This process cannot be explained by the classical three-step model. Our results indicate that the previously well-established concept that HATI is an elastic recollision process is broken down.

【关键词】 collision； ultraviolet； Atomic； extreme； parent； explained； broken； ionization； Electron； photoelectron；
【基金】 Supported by the National Natural Science Foundation of China under Grant Nos 11474348,61275128,11274050,11334009and 11425414;the NSERC of Canada;the Canadian Computing Facilities of SHARCnet and ACEnet;the National Basic Research Program of China under Grant No 2013CB922200
  • 【文献出处】 Chinese Physics Letters ,中国物理快报(英文版) , 编辑部邮箱 ,2017年11期
  • 【分类号】TN24
  • 【被引频次】1
  • 【下载频次】23
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