Temporal dependence of high-order harmonics in the presence of strong ionization
A. BouhalLaboratoire d’Optique Appliquée, ENSTA-École-Polytechnique, 91125 Palaiseau, FranceP. SalièresService des Photons, Atomes et Molécules DSM-DRECAM, CEA Saclay, 91191 Gif-sur-Yvette, FranceP. BregerService des Photons, Atomes et Molécules DSM-DRECAM, CEA Saclay, 91191 Gif-sur-Yvette, FrancePierre AgostiniService des Photons, Atomes et Molécules DSM-DRECAM, CEA Saclay, 91191 Gif-sur-Yvette, FranceG. HamoniauxLaboratoire d’Optique Appliquée, ENSTA-École-Polytechnique, 91125 Palaiseau, FranceA. MysyrowiczLaboratoire d’Optique Appliquée, ENSTA-École-Polytechnique, 91125 Palaiseau, FranceA. AntonettiLaboratoire d'Optique AppliquéeR. C. ConstantinescuFOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The NetherlandsH. G. MullerFOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
1998en
ABI
Annotatsiya
The temporal behavior of the 19th harmonic of a Ti:sapphire laser generated in argon was investigated by a cross-correlation technique at intensities close to saturation. Pulses about half as long as predicted on the basis of the scaling law of the atomic dipole strength on intensity were found. Analysis shows that this is a consequence of both the intensity-dependent dipole phase and the depletion of the medium by ionization.
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