title: Gouy phase shift for few-cycle laser pulses.
abstract: We measured for the first time the influence of the Gouy effect on focused few-cycle laser pulses. The carrier-envelope phase is shown to undergo a smooth variation over a few Rayleigh distances. This result is of critical importance for any application of ultrashort laser pulses, including high-harmonic and attosecond pulse generation, as well as phase-dependent effects.
authors.affiliation: Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Lindner
authors.forename: G G
authors.initials: GG
authors.lastname: Paulus
authors.forename: H
authors.initials: H
authors.lastname: Walther
authors.forename: A
authors.initials: A
authors.lastname: Baltuska
authors.forename: E
authors.initials: E
authors.lastname: Goulielmakis
authors.forename: M
authors.initials: M
authors.lastname: Lezius
authors.forename: F
authors.initials: F
authors.lastname: Krausz