| Duration-Dependent Asymmetry in Photoionization of H atoms in Few-Cycle Laser Pulses |
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| 作者姓名： | 张晓明 张敬涛 白丽华 龚旗煌 徐至展 |
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| 作者单位： | [1]State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100087 [2]State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 60408008, the Natural Science Key Foundation of Shanghai under Grant No 04JC14036, and the Rising-Star Program of Shanghai. |
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| 摘 要： | The photoionization of H atoms irradiated by few-cycle laser pulses is studied numerically. The variations of the total ionization, the partial ionizations in opposite directions, and the corresponding asymmetry with the carrier-envelope phase in several pulse durations are obtained. We find that besides a stronger modulation on the partial ionizations, the change of pulse duration leads to a shift along carrier-envelope （CE） phase in the calculated signals. The phase shift arises from the nonlinear property of ionization and relates closely to the Coulomb attraction of the parent ion to the ionized electron. Our calculations show good agreement with the experimental observation under similar conditions.
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| 关 键 词： | 激光脉冲 H核 光电离 光周期量级 脉冲宽度相关不对称 |
| 收稿时间： | 2006-07-20 |
| 修稿时间： | 2006-07-20 |
Duration-Dependent Asymmetry in Photoionization of H atoms in Few-Cycle Laser Pulses |
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| ZHANG Xiao-Mingv,ZHANG Jing-Tao,BAI Li-Hua&sup,GONG Qi-Huang,XU Zhi-Zhan.Duration-Dependent Asymmetry in Photoionization of H atoms in Few-Cycle Laser Pulses[J].Chinese Physics Letters,2006,23(12):3249-3252. |
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| Authors: | ZHANG Xiao-Mingv ZHANG Jing-Tao BAI Li-Hua&sup GONG Qi-Huang XU Zhi-Zhan |
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| Affiliation: | 1.State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100087 ;2.State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| Abstract: | The photoionization of H atoms irradiated by few-cycle laser pulses is studied numerically. The variations of the total ionization, the partial ionizations in opposite directions, and the corresponding asymmetry with the carrier--envelope phase in several pulse durations are obtained. We find that besides a stronger modulation on the partial ionizations, the change of pulse duration leads to a shift along carrier--envelope (CE) phase in the calculated signals. The phase shift arises from the nonlinear property of ionization and relates closely to the Coulomb attraction of the parent ion to the ionized electron. Our calculations show good agreement with the experimental observation under similar conditions. |
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| Keywords: | 32 80 Rm 42 50 Hz 42 50 Vk 42 50 Ct |
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