title: Laser-assisted photoelectric effect from surfaces.
abstract: We report the first observation of the laser-assisted photoelectric effect from a solid surface. By illuminating a Pt(111) sample simultaneously with ultrashort 1.6 eV and 42 eV pulses, we observe sidebands in the extreme ultraviolet photoemission spectrum. The magnitude of these sidebands as a function of time delay between the laser and extreme ultraviolet pulses represents a cross-correlation measurement of the extreme ultraviolet pulse. This effect promises to be useful to extend extreme ultraviolet pulse duration measurements to higher photon energies, as well as opening up femtosecond-to-attosecond time-scale electron dynamics in solid and surface-adsorbate systems.
authors.affiliation: Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440, USA.
authors.forename: L
authors.initials: L
authors.lastname: Miaja-Avila
authors.forename: C
authors.initials: C
authors.lastname: Lei
authors.forename: M
authors.initials: M
authors.lastname: Aeschlimann
authors.forename: J L
authors.initials: JL
authors.lastname: Gland
authors.forename: M M
authors.initials: MM
authors.lastname: Murnane
authors.forename: H C
authors.initials: HC
authors.lastname: Kapteyn
authors.forename: G
authors.initials: G
authors.lastname: Saathoff