Description of harmonic generation in terms of the complex quasienergy. II. Application to time-dependent effective range theory

Authors

M.V. Frolov, Voronezh State University, Voronezh 394006, Russia
A.V. Flegel, Voronezh State University, Voronezh 394006, Russia
N. L. Manakov, Voronezh State UniversityFollow
Anthony F. Starace, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

6-13-2007

Comments

Published in PHYSICAL REVIEW A 75, 063408 2007. ©2007 The American Physical Society. Used by permission.

Abstract

A formulation for the high-order harmonic generation (HHG) amplitude [M. V. Frolov et al., Phys. Rev. A 75, 063407 (2007), preceding paper] is employed to provide analytical results for HHG rates within our recently developed time-dependent effective range (TDER) theory (for time-dependent problems involving weakly bound electron systems). Exact and approximate (including quasiclassical) TDER HHG rates are employed to analyze the accuracy of common approximate methods for HHG calculations. For various specific negative ions with s and p outer electrons, numerical results for HHG spectra are presented over a wide interval of laser frequencies(extending from the tunneling to the multiphoton regimes). The role of initial bound state symmetry effects on the HHG spectra is also analyzed. Finally, Coulomb corrections to TDER results for HHG rates are introduced and discussed.