Article

Abstract

• 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.

Creator

• Becker, A
• Plaja, L
• Murnane, M.M.
• Popmintchev, T
• Jaron-Becker, A
• Kapteyn, H.C.
• Hernández-García, C

Date Issued

• 2016-07-14

Academic Affiliation

• Physics

Journal Title

• New Journal of Physics

Journal Volume

• 18

Subject

• attosecond pulses
• mid-infrared lasers
• group velocity matching
• high harmonic generation
• EUV / soft x-ray

Last Modified

• 2019-12-05

Resource Type

• Article

Rights Statement

• In Copyright

DOI

•  http://dx.doi.org/10.1088/1367-2630/18/7/073031

ISSN

• 1367-2630

Language

• English [eng]

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