title: Generation of extreme ultraviolet continuum radiation driven by a sub-10-fs two-color field.
abstract: We have proposed and demonstrated a novel approach for generating high-energy extreme-ultraviolet (XUV) continuum radiation. When a two-color laser field consisting of a sub-10-fs fundamental and its parallel-polarized second harmonic was applied to high-order harmonic generation in argon, a continuum spectrum centered at 30 nm was successfully obtained with an energy as high as 10 nJ. This broadband emission indicates the possibility of generating intense single attosecond pulses in the XUV region.
authors.affiliation: Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-0061, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Oishi
authors.forename: Masanori
authors.initials: M
authors.lastname: Kaku
authors.forename: Akira
authors.initials: A
authors.lastname: Suda
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Kannari
authors.forename: Katsumi
authors.initials: K
authors.lastname: Midorikawa
mesh_terms: D003116:Color; D003198:Computer Simulation; D004867:Equipment Design; D007834:Lasers; D008027:Light; D008962:Models, Theoretical; D036103:Nanotechnology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation