title: Method for high-resolution frequency measurements in the extreme ultraviolet regime: random-sampling Ramsey spectroscopy.
abstract: Ramsey-like schemes have been recently introduced in combination with high-order laser harmonic sources for high-resolution spectroscopic studies in the extreme ultraviolet (XUV). Here we demonstrate a novel method, combining measurements only in a limited subset of randomly chosen time-sampling intervals, which lead us to perform the first high-resolution XUV spectroscopy of atomic argon with a simple split-pulse setup. Providing an experimentally simple and convenient solution to the problem of performing high-resolution absolute frequency measurements in the XUV, our approach will help paving new roads into this challenging spectral territory.
authors.affiliation: Istituto Nazionale di Ottica (INO-CNR), L.go E. Fermi 6, 50125 Florence, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Eramo
authors.forename: S
authors.initials: S
authors.lastname: Cavalieri
authors.forename: C
authors.initials: C
authors.lastname: Corsi
authors.forename: I
authors.initials: I
authors.lastname: Liontos
authors.forename: M
authors.initials: M
authors.lastname: Bellini