中国物理B ›› 2009, Vol. 18 ›› Issue (3): 1014-1018.doi: 10.1088/1674-1056/18/3/028

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Intensity-dependent asymmetric photoionization in few-cycle laser pulses

张敬涛1, 龚旗煌1, 张晓明2, 徐至展2   

  1. (1)State Key Laboratory for High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; (2)State Key Laboratory for High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871
  • 收稿日期:2008-04-15 修回日期:2008-06-26 出版日期:2009-03-20 发布日期:2009-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60408008 and 10774153), the Natural Science Key Foundation of Shanghai (Grant No 04JC14036), the National Basic Research Program of China (Grant No 2006CD806000), and the Ris

Intensity-dependent asymmetric photoionization in few-cycle laser pulses

Zhang Xiao-Ming(张晓明)a)b), Zhang Jing-Tao(张敬涛)a)†, Gong Qi-Huang(龚旗煌)b), and Xu Zhi-Zhan(徐至展)a)b)   

  1. a State Key Laboratory for High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; b State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China
  • Received:2008-04-15 Revised:2008-06-26 Online:2009-03-20 Published:2009-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60408008 and 10774153), the Natural Science Key Foundation of Shanghai (Grant No 04JC14036), the National Basic Research Program of China (Grant No 2006CD806000), and the Ris

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摘要： The asymmetric photoionization of atoms irradiated by intense, few-cycle laser pulses is studied numerically. The results show that the pulse intensity affects the asymmetric photoionization in three aspects. First, at higher intensities, the asymmetry becomes distinctive for few-cycle pulses of longer durations. Second, as the laser intensity increases, the maximal asymmetry first decreases then increases after it has reached a minimal value. Last, the value of the carrier-envelope phase corresponding to the maximal asymmetry varies with the pulse intensity. This study reveals that the increasing of pulse intensity is helpful for observing the asymmetric photoionization.

关键词: asymmetric photoionization, few-cycle laser pulses

Abstract: The asymmetric photoionization of atoms irradiated by intense, few-cycle laser pulses is studied numerically. The results show that the pulse intensity affects the asymmetric photoionization in three aspects. First, at higher intensities, the asymmetry becomes distinctive for few-cycle pulses of longer durations. Second, as the laser intensity increases, the maximal asymmetry first decreases then increases after it has reached a minimal value. Last, the value of the carrier-envelope phase corresponding to the maximal asymmetry varies with the pulse intensity. This study reveals that the increasing of pulse intensity is helpful for observing the asymmetric photoionization.

Key words: asymmetric photoionization, few-cycle laser pulses

中图分类号:  (Photoionization of atoms and ions)

  • 32.80.Fb
31.15.-p (Calculations and mathematical techniques in atomic and molecular physics)