Quantum theory of a high harmonic generation as a three-step process
Abstract
Fully quantum treatment explicitly presents the high harmonic generation as a three-step process: (i) above threshold ionization (ATI) is followed by (ii) electron propagation in a laser-dressed continuum. Subsequently (iii) stimulated (or laser assisted) recombination brings the electron back into the initial state with emission of a high-energy photon. Contributions of all ATI channels add up coherently. All three stages of the process are described by simple, mostly analytical expressions that allow a detailed physical interpretation. A very good quantitative agreement with the previous calculations on the harmonic generation by H-minus ion is demonstrated, thus supplementing the conceptual significance of the theory with its practical efficiency. The virtue of the present scheme is further supported by a good accord between the calculations in length and velocity gauges for the high-energy photon.
Cite
@article{arxiv.physics/9906053,
title = {Quantum theory of a high harmonic generation as a three-step process},
author = {M. Yu. Kuchiev and V. N. Ostrovsky},
journal= {arXiv preprint arXiv:physics/9906053},
year = {2009}
}
Comments
Revtex 23 pages, 4 figures. Accepted for publication in Phys.Rev.A (1999)