Journal of East China Normal University(Natural Science) ›› 2020, Vol. 2020 ›› Issue (2): 55-63.doi: 10.3969/j.issn.1000-5641.201922010

• Physics and Electronics • Previous Articles     Next Articles

Non-sequential double ionization of argon in counterrotating circularly polarized two-color laser fields

QIAN Lijie, YANG Yan, SUN Zhenrong   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • Received:2019-04-23 Published:2020-03-16

Abstract: In this paper, the non-sequential double ionization (NSDI) process of Ar in 800 nm and 400 nm counterrotating circularly polarized two-color(CRTC) laser fields was studied using the classical ensemble model. The dependence of the non-sequential double ionization mechanism and quantum yield on laser intensity, laser intensity ratio, relative phase, and pulse duration of two pulses is calculated and analyzed in detail. The energy evolution of two electrons in the time domain is obtained and two different non-sequential double ionization mechanisms are revealed. The influence of the electron collision energy for different non-sequential double ionization processes is also discussed.

Key words: non-sequential double ionization(NSDI), two-color laser fields, classical ensemble model, electron collision, multi-electron dynamics

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