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Duration-Dependent Asymmetry in Photoionization of H atoms in Few-Cycle Laser Pulses

Duration-Dependent Asymmetry in Photoionization of H atoms in Few-Cycle Laser Pulses
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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. 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.
出处 《Chinese Physics Letters》 SCIE CAS CSCD 2006年第12期3249-3252,共4页 中国物理快报(英文版)
基金 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.
关键词 ELECTRON LOCALIZATION ABSOLUTE-PHASE SCALING LAW IONIZATION SUPPRESSION FIELDS ELECTRON LOCALIZATION ABSOLUTE-PHASE SCALING LAW IONIZATION SUPPRESSION FIELDS
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