High-harmonic generation in molecular ions: Dipole phases and temporal aspects

Citation
R. Kopold et W. Becker, High-harmonic generation in molecular ions: Dipole phases and temporal aspects, LASER PHYS, 9(1), 1999, pp. 398-402
Citations number
25
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
LASER PHYSICS
ISSN journal
1054660X → ACNP
Volume
9
Issue
1
Year of publication
1999
Pages
398 - 402
Database
ISI
SICI code
1054-660X(199901/02)9:1<398:HGIMID>2.0.ZU;2-3
Abstract
A two-center zero-range potential in the presence of an external field sinu soidal in time is used to describe high-harmonic generation by a molecular ion. The resulting properties of the harmonic spectrum are analyzed in term s of the semiclassical three-step or simple man's model. Very good agreemen t is observed. A time-frequency analysis of the harmonic spectrum points to the significance of the semiclassical return times for the temporal struct ure of the harmonic output, In simple cases, the return time is directly re lated to the phase difference between adjacent harmonics.