title: Inhomogeneous high harmonic generation in krypton clusters.
abstract: High order harmonic generation from clusters is a controversial topic: conflicting theories exist, with different explanations for similar experimental observations. From an experimental point of view, separating the contributions from monomers and clusters is challenging. By performing a spectrally and spatially resolved study in a controlled mixture of clusters and monomers, we are able to isolate a region of the spectrum where the emission purely originates from clusters. Surprisingly, the emission from clusters is depolarized, which is the signature of statistical inhomogeneous emission from a low-density source. The harmonic response to laser ellipticity shows that this generation is produced by a new recollisional mechanism, which opens the way to future theoretical studies.
authors.affiliation: CELIA, Université de Bordeaux-CNRS-CEA, UMR5107, F33405 Talence, France.
authors.forename: H
authors.initials: H
authors.lastname: Ruf
authors.forename: C
authors.initials: C
authors.lastname: Handschin
authors.forename: R
authors.initials: R
authors.lastname: Cireasa
authors.forename: N
authors.initials: N
authors.lastname: Thiré
authors.forename: A
authors.initials: A
authors.lastname: Ferré
authors.forename: S
authors.initials: S
authors.lastname: Petit
authors.forename: D
authors.initials: D
authors.lastname: Descamps
authors.forename: E
authors.initials: E
authors.lastname: Mével
authors.forename: E
authors.initials: E
authors.lastname: Constant
authors.forename: V
authors.initials: V
authors.lastname: Blanchet
authors.forename: B
authors.initials: B
authors.lastname: Fabre
authors.forename: Y
authors.initials: Y
authors.lastname: Mairesse