Open AccessInvestigation of high order harmonic generation and ionization of model hydrogen atoms and real hydrogen atom in intense laser field
Author(s) -
Zhao Song-feng,
Xiaoxin Zhou,
Cheng Jin
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.4078
Subject(s) - ionization , atomic physics , hydrogen atom , tunnel ionization , atom (system on chip) , hydrogen , physics , molar ionization energies of the elements , high harmonic generation , field (mathematics) , photoionization , laser , ion , quantum mechanics , mathematics , pure mathematics , computer science , embedded system , group (periodic table)
Solving time-dependent Schrdinger equation numerically, we investigate the high-order harmonic generation and ionization probability of one-dimensional, two-dimensional and three-dimensional hydrogen atom exposed to intense laser field. Our results show that high-order harmonic generations and the ionization probabilities of the model atoms and real hydrogen atom are similar both in the multi-photon ionization regime and in the over-barrier ionization regime; in the tunneling ionization regime, the plateau feature and cut-off position of high order harmonic generations of the model atoms and real hydrogen atom are almost the same, and the trend of change of the ionization probabilities with time is similar, but the values of ionization probabilities for the model atoms are different from those for real hydrogen atom. We discuss the reason for the difference of ionization probabilities between the model atoms and the real hydrogen atom according to the classical three-step model.