J. Phys. IV France
Volume 11, Numéro PR2, Juillet 2001
X-Ray Lasers 2000
Page(s) Pr2-373 - Pr2-376
7th International Conference on X-Ray Lasers

J. Phys. IV France 11 (2001) Pr2-373-Pr2-376

DOI: 10.1051/jp4:2001272

Double-peak splitting in high-order harmonics generation

Yingsong Wang, Yaquing Liu, X.D. Yang and Z.Z. Xu

Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, P.R. China

High-order harmonic generation in argon gaseous medium is experimentally studied, using superintense 46-fs Ti :sapphire laser pulses. The double-peak splitting in the generated harmonic spectra is clearly observed when the driving laser intensity is upgraded to far higher than the saturation intensity of the medium involved. The possible reasons for the observed splitting are discussed in this presentation. This splitting is mainly attributed to the propagation effects of harmonic fields in the rapid ionizing medium.

© EDP Sciences 2001