title: Spectral characterization of laser-driven solid-based high harmonics in the coherent wake emission regime.
abstract: Laser-produced surface high-harmonic generation is an attractive source of extreme ultraviolet radiation due to its coherent properties and high peak power. By operating at subrelativistic laser intensities in the coherent wake emission regime, the harmonic spectrum was experimentally studied versus laser properties. At higher laser intensities (>10(17) W/cm(2)) a higher spectral cutoff was observed, with accompanying blueshifting and spectral broadening of the individual orders. A model based on an expanding critical surface provides qualitative agreement with the observations.
authors: J
authors: J
authors: van Tilborg
authors: B H
authors: BH
authors: Shaw
authors: T
authors: T
authors: Sokollik
authors: S
authors: S
authors: Rykovanov
authors: S
authors: S
authors: Monchocé
authors: F
authors: F
authors: Quéré
authors: Ph
authors: P
authors: Martin
authors: A
authors: A
authors: Malvache
authors: W P
authors: WP
authors: Leemans