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- Title
Ionization phase-match gating for wavelength-tunable isolated attosecond pulse generation.
- Authors
Jullien, A.; Pfeifer, T.; Abel, M. J.; Nagel, P. M.; Bell, M. J.; Neumark, D. M.; Leone, S. R.
- Abstract
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, ). 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.
- Subjects
IONIZATION (Atomic physics); PULSE generators; WAVELENGTHS; ULTRASHORT laser pulses; LASER research
- Publication
Applied Physics B: Lasers & Optics, 2008, Vol 93, Issue 2/3, p433
- ISSN
0946-2171
- Publication type
Article
- DOI
10.1007/s00340-008-3187-z