J4 ›› 2011, Vol. 28 ›› Issue (2): 136-141.

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Photodetachment of ions in ultrafast strong laser fields: a test of scaling law of photoionization

BAI Li-hua, HOU Lu-qiang, CUI Ting-ting, Liu Yu-heng, WANG Yan, Yan Xiao-na   

  1. Department of Physics, Shanghai University, Shanghai 200444, China
  • Published:2011-03-28 Online:2011-03-03

Abstract:

Under the frame of quantum electrodynamics, by using a nonperturbative quantum scattering theory, photodetachment of ions in ultrafast strong laser fields was investigated. It was found that for the same above-detachment peaks, with the cycle number and carrier-envelope phase constant, when ions with γ times of binding energy were irradiated by γ times of frequency and γ3 times of laser intensity, angular distributions of photoelectrons didn’t change, where γ was arbitrary positive real. The study verifies the scaling law of photoionization in few-cycle laser pulses.

Key words: nonlinear optics, photodetachment, nonperturbative quantum scattering theory, scaling law

CLC Number: