title: High-harmonic generation from plasma mirrors at kilohertz repetition rate.
abstract: We report the first demonstration of high-harmonic generation from plasma mirrors at a 1 kHz repetition rate. Harmonics up to nineteenth order are generated at peak intensities close to 10¹⁸ W/cm² by focusing 1 mJ, 25 fs laser pulses down to 1.7 μm FWHM spot size without any prior wavefront correction onto a moving target. We minimize target surface motion with respect to the laser focus using online interferometry to ensure reproducible interaction conditions for every shot and record data at 1 kHz with unprecedented statistics. This allows us to unambiguously identify coherent wake emission as the main generation mechanism.
authors.affiliation: Laboratoire d'Optique Appliquée, Ecole Nationale Superieur de Techniques Avancées-Paristech, Ecole Polytechnique, CNRS, 91761 Palaiseau Cedex, France. antonin.borot@ensta‐paristech.fr
authors.forename: Antonin
authors.initials: A
authors.lastname: Borot
authors.forename: Arnaud
authors.initials: A
authors.lastname: Malvache
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Chen
authors.forename: Denis
authors.initials: D
authors.lastname: Douillet
authors.forename: Grégory
authors.initials: G
authors.lastname: Iaquianiello
authors.forename: Thierry
authors.initials: T
authors.lastname: Lefrou
authors.forename: Patrick
authors.initials: P
authors.lastname: Audebert
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Geindre
authors.forename: Gérard
authors.initials: G
authors.lastname: Mourou
authors.forename: Fabien
authors.initials: F
authors.lastname: Quéré
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Lopez-Martens