title: Enhanced high harmonic generation from multiply ionized argon above 500 eV through laser pulse self-compression.
abstract: By combining laser pulse self-compression and high harmonic generation within a single waveguide, we demonstrate high harmonic emission from multiply charged ions for the first time. This approach enhances the laser intensity and counteracts ionization-induced defocusing, extending the cutoff photon energy in argon above 500 eV for the first time, with higher spectral intensity and cutoff energy than He for the same input laser parameters. This Letter demonstrates a pathway for extending high harmonic emission to very high photon energies using large, multiply charged, ions with high ionization potentials.
authors.affiliation: JILA and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA. Paul.Arpin@colorado.edu
authors.forename: P
authors.initials: P
authors.lastname: Arpin
authors.forename: T
authors.initials: T
authors.lastname: Popmintchev
authors.forename: N L
authors.initials: NL
authors.lastname: Wagner
authors.forename: A L
authors.initials: AL
authors.lastname: Lytle
authors.forename: O
authors.initials: O
authors.lastname: Cohen
authors.forename: H C
authors.initials: HC
authors.lastname: Kapteyn
authors.forename: M M
authors.initials: MM
authors.lastname: Murnane