title: Two-beam high-order harmonics from solids: coupling mechanisms.
abstract: The polarization of the two beam (driver-probe) high-order harmonic generation from solids is measured. The experiments, together with computer simulations, allow us to distinguish two different coupling mechanisms of the driver and the probe, resulting in different harmonic efficiencies and spectral slopes. We find that in the nonrelativistic regime the coupling is mostly due to the nonlinear plasma density modulation.
authors.affiliation: Fakultät für Physik, Universität Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany. alexander.tarasevitch@uni-due.de
authors.forename: A
authors.initials: A
authors.lastname: Tarasevitch
authors.forename: J
authors.initials: J
authors.lastname: Wieczorek
authors.forename: R
authors.initials: R
authors.lastname: Kohn
authors.forename: U
authors.initials: U
authors.lastname: Bovensiepen
authors.forename: D
authors.initials: D
authors.lastname: von der Linde