Role of XUV Photons in Atomic High-Order Above-Threshold Ionization Processes in IR＋XUV Two-Color Laser Fields
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...
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| Published in | Chinese physics letters Vol. 34; no. 11; pp. 15 - 19 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.11.2017
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| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/34/11/113201 |
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| Summary: | 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 elassical three-step model Our results indicate that the previously well-established concept that HATI is an elastic recollision process is broken down. |
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| Bibliography: | 11-1959/O4 Kui Zhang1, Min Liu1, Bing-Bing Wang1, Ying-Chun Guo2, Zong-Chao Yan3,4,5, Jing Chen6,7, Xiao-Jun Liu4（ 1Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 ; 2 Department of Physics, East China Normal University, Shanghai 200241 ; 3Department of Physics, University of New Brunswick, Fredericton, New Brunswick, Canada; 4State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 ; 5 Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071 ; 6 HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871; 7Institute of Applied Physics and Computational Mathematics, Beijing 100088） 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 elassical three-step model Our results indicate that the previously well-established concept that HATI is an elastic recollision process is broken down. |
| ISSN: | 0256-307X 1741-3540 |
| DOI: | 10.1088/0256-307X/34/11/113201 |