Open AccessMass shift effect on relativistic high-order harmonic generation
Author(s) -
Fei Guo,
Ji-Gen Chen,
Yu-Jun Yang,
Siliang Zeng
Publication year - 2012
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.61.173202
Subject(s) - physics , high harmonic generation , laser , harmonic spectrum , relativistic quantum chemistry , cutoff , relativistic particle , relativistic wave equations , pulse (music) , dirac equation , quantum electrodynamics , atomic physics , quantum mechanics , electron , voltage
By solving the time-dependent Dirac and Schrödinger equations, we investigate the super high-order harmonic generation (HHG) from a one-dimensional model atom in a relativistic intense laser pulse. Our numerical simulations show that the relativistic results can be degraded to non-relativistic ones in the weak laser field, and the clear effect of the relativistic mass-shift can be gradually observed as the increase of the laser field intensity. Furthermore, the cutoff frequency and the emission efficiency of the HHG spectrum are analyzed by the wavelet time-frequency analysis and the relativistic "three-step" model.