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Duration-Dependent Asymmetry in Photoionization of H atoms in Few-Cycle Laser Pulses |
| ZHANG Xiao-Mingv;ZHANG Jing-Tao2;BAI Li-Hua²;GONG Qi-Huang1;XU Zhi-Zhan1,2 |
| ¹State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100087
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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| Cite this article: |
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ZHANG Xiao-Mingv, ZHANG Jing-Tao, BAI Li-Hua&sup et al 2006 Chin. Phys. Lett. 23 3249-3252 |
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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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Published: 01 December 2006
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| PACS: |
32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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42.50.Vk
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42.50.Ct
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(Quantum description of interaction of light and matter; related experiments)
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