Ionization phase-match gating for wavelength-tunable isolated attosecond pulse generation

被引：0
作者：
A. Jullien
T. Pfeifer
M. J. Abel
P. M. Nagel
M. J. Bell
D. M. Neumark
S. R. Leone
机构：
[1] University of California,Departments of Chemistry and Physics
[2] Lawrence Berkeley National Laboratory,Chemical Sciences Division
[3] Ecole Polytechnique,Laboratoire d’Optique Appliquée, ENSTA ParisTech
[4] CNRS,undefined
[5] UMR 7639,undefined
来源：
Applied Physics B | 2008年 / 93卷
关键词：
42.65.Ky; 41.50.+h; 42.50.Hz; 42.65.Re;
D O I：
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摘要：
High-order harmonic emission can be confined to the leading edge of an 800 nm driver laser pulse under moderately intense focusing conditions (7×1014 W/cm2) (Pfeifer et al. in Opt. Express 15:17120, 2007). Here, the experimentally observed curtailment of harmonic production on the leading edge of the driver pulse is shown to be controlled by an ionization-induced phase-matching condition. The transient plasma density inherent to the process of high-harmonic generation terminates the harmonic emission by an ultrafast loss of phase matching on the leading edge of the laser pulse. The analysis is supported by a reconstruction of the in situ intensity envelope of the driver pulse with attosecond temporal resolution, performed by measurements of the carrier-envelope phase dependence of individual half-cycle harmonic cutoffs. The method opens the way to wavelength-tunable isolated attosecond pulse generation.
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页码：433 / 442
页数：9
相关论文
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