par De Morisson Faria, Carla Figueira;Dorr, Martin 
;Sandner, Wolfgang
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 58, 4, page (2990-2999)
Publication Publié, 1998-10
;Sandner, WolfgangRéférence Physical review. A, Atomic, Molecular, and Optical Physics, 58, 4, page (2990-2999)
Publication Publié, 1998-10
Article révisé par les pairs
| Résumé : | We discuss the mechanism of harmonic generation for a one-dimensional model atom with several bound states in a strong, driving laser field. We extract the bound- and continuum-components of the harmonic radiation and investigate their temporal and spectral characteristics. We compare the bound-bound contributions from a fully numerical solution of the Schrödinger equation with the results from a two-level atom, and study the influence of effective ionization rates in the latter. In the generation of the low harmonics, bound-bound transitions play a decisive role. However, a two-level atom model is not adequate for reproducing their characteristics. High-harmonic generation is almost entirely determined by bound-continuum transitions, the transitions involving the ground state being dominant. |
