title: Seventy-first harmonic generation from doubly charged ions in preformed laser-ablation vanadium plume at 110 eV.
abstract: We have demonstrated a generation of 71(st) harmonic at a photon energy of 110 eV (wavelength 11.2 nm) using low ionized vanadium ions in a laser-ablation plume. The conversion efficiency of this harmonic was estimated to be 1.6x10(-7). Such high harmonic generation occurred from the interaction of a femtosecond laser pulse with a doubly charged ion, which has high third ionization potential. This work shows the extension of HHG cutoff energy can be achieved by using the doubly charged ion.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Suzuki
authors.forename: Luc Bertrand
authors.initials: LB
authors.lastname: Elouga Bom
authors.forename: Tsuneyuki
authors.initials: T
authors.lastname: Ozaki
authors.forename: Rashid A
authors.initials: RA
authors.lastname: Ganeev
authors.forename: Motoyoshi
authors.initials: M
authors.lastname: Baba
authors.forename: Hiroto
authors.initials: H
authors.lastname: Kuroda