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Título
Group velocity matching in high-order harmonic generation driven by mid-infrared lasers
Autor(es)
Assunto
High harmonic generation
group velocity matching
Attosecond pulses
EUV/soft x-ray
mid-infrared lasers
Fecha de publicación
2016-07
Citación
C. Hernández-García, T Popmintchev, M M Murnane, H. C. Kapteyn, L. Plaja, A. Becker, & A. Jaron-Becker. (2016). Group velocity matching in high-order harmonic generation driven by mid-infrared lasers. New Journal of Physics, 18, 073031. https://doi.org/10.1088/1367-2630/18/7/073031
Resumen
We analyze the role of group-velocity matching (GVM) in the macroscopic build up of the high-harmonic signal generated in gas targets at high pressures. A definition of the walk-off length, associated with GVM, in the non-perturbative intensity regime of high-harmonic generation is given. Semiclassical predictions based on this definition are in excellent agreement with full quantum simulations. We demonstrate that group velocity matching is a relevant factor in high harmonic generation and the isolation of attosecond pulses driven by long wavelength lasers and preferentially selects contributions from the short quantum trajectories.
URI
DOI
10.1088/1367-2630/18/7/073031
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