Pm. Fu et al., Interrelation between high-order harmonic generation and above-threshold ionization - art. no. 063401, PHYS REV A, 6406(6), 2001, pp. 3401
We study the interrelation between high-order harmonic generation (HHG) and
above-threshold ionization (ATI) in the frequency domain. HHG can be descr
ibed simply as an ATI followed by laser assisted recombination (LAR). The p
lateau reflects mainly the characteristics of LAR. We also study the corres
pondence between frequency-domain and time-domain pictures of HHG.