Quantum theory of a high harmonic generation as a three-step process
arXiv:physics/9906053 · doi:10.1103/PhysRevA.60.3111
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.
Revtex 23 pages, 4 figures. Accepted for publication in Phys.Rev.A (1999)
References in corpus (2)
Cited by in corpus (10)
- Atoms and Molecules in Intense Laser Fields: Gauge Invariance of Theory and Models
- High-harmonic generation from arbitrarily oriented diatomic molecules including nuclear motion and field-free alignment
- Multiphoton radiative recombination of electron assisted by laser field
- Above-threshold ionization and photoelectron spectra in atomic systems driven by strong laser fields
- Effective ATI Channels in High Harmonic Generation
- High Harmonic Generation via Continuum Wave-Packet Interference
- Theoretical studies of high-harmonic generation: Effects of symmetry, degeneracy and orientation
- High-order harmonic generation with resonant core excitation by ultraintense x rays
- Attosecond dynamics of light-induced resonant hole transfer in high-order-harmonic generation
- Quantum Optical Aspects of High-Harmonic Generation