| Double-Exponentially Decayed Photoionization in CREI Effect： Numerical Experiment on 3D H2^＋ |
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| 引用本文： | 李峰,王廷营,张贵忠,向望华,希尔三世.Double-Exponentially Decayed Photoionization in CREI Effect： Numerical Experiment on 3D H2^＋[J].中国物理快报,2008,25(2):465-467. |
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| 作者姓名： | 李峰 王廷营 张贵忠 向望华 希尔三世 |
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| 作者单位： | [1]College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072 [2]Key Lab of Optoelectronic Information and Technical Science （Ministry of Education）, Tianjin University, Tianjin 300072 [3]Institute for Physical Science and Technology, University of Maryland at College Park, MD20742, USA |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10674100, and the Tianjin Municipal Commission for Science and Technology under Grant No 07JCYBJC06100. |
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| 摘 要： | On the platform of the 3D H2^＋ system, we perform a numerical simulation of its photoionization rate under excitation of weak to intense laser intensities with varying pulse durations and wavelengths. A novel method is proposed for calculating the photoionization rate： a double exponential decay of ionization probability is best suited for fitting this rate. Confirmation of the well-documented charge-resonance-enhanced ionization （CREI） effect at medium laser intensity and finding of ionization saturation at high light intensity corroborate the robustness of the suggested double-exponential decay process. Surveying the spatial and temporal variations of electron wavefunctions uncovers a mechanism for the double-exponentially decayed photoionization probability as onset of electron ionization along extra degree of freedom. Henceforth, the new method makes clear the origins of peak features in photoionization rate versus internuclear separation. It is believed that this multi-exponentially decayed ionization mechanism is applicable to systems with more degrees of motion.
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| 关 键 词： | 电荷共振增强电离 双指数衰减光致电离作用 数字实验 氢离子 |
| 收稿时间： | 2007-08-23 |
Double-Exponentially Decayed Photoionization in CREI Effect: Numerical Experiment on 3D H2+ |
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| LI Feng,WANG Ting-Ying,ZHANG Gui-Zhong,XIANG Wang-Hua,W. T. Hill III.Double-Exponentially Decayed Photoionization in CREI Effect: Numerical Experiment on 3D H2+[J].Chinese Physics Letters,2008,25(2):465-467. |
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| Authors: | LI Feng WANG Ting-Ying ZHANG Gui-Zhong XIANG Wang-Hua W T Hill III |
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| Institution: | College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072Key Lab of Optoelectronic Information and Technical Science (Ministry of Education), Tianjin University, Tianjin 300072Institute for Physical Science and Technology, University of Maryland at College Park, MD20742, USA |
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| Abstract: | On the platform of the 3D H2+ system, we perform a numerical simulation of its photoionization rate under excitation of weak to intense laser intensities with varying pulse durations and wavelengths. A novel method is proposed for calculating the photoionization rate: a double exponential decay of ionization probability is best suited for fitting this rate. Confirmation of the well-documented charge-resonance-enhanced ionization (CREI) effect at medium laser intensity and finding of ionization saturation at high light intensity corroborate the robustness of the suggested double-exponential decay process. Surveying the spatial and temporal variations of electronwavefunctions uncovers a mechanism for the double-exponentially decayed photoionization probability as onset of electron ionization along extra degree of freedom. Henceforth, the new method makes clear the origins of peak features in photoionization rate versus internuclear separation. It is believed that this multi-exponentially decayed ionization mechanism is applicable to systems with more degrees of motion. |
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| Keywords: | 31 15 Qg 33 80 Rv 32 80 Rm |
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