title: Generation of coherent soft-X-ray radiation extending far beyond the titanium L edge.
abstract: Coherent soft-x-ray radiation up to photon energies of 700 eV is obtained by focusing several-mJ, 10-fs near infrared laser pulses into a He gas jet. The observed nearly constant photon yield over several hundred eVs may be attributed to nonadiabatic self-phase matching, originating from a substantial ionization within a fraction of the optical cycle of the driving laser pulse.
authors.affiliation: Institut für Photonik, Technische Universität Wien, Gusshausstrasse 27/387, 1040 Wien, Austria.
authors.forename: Enikö
authors.initials: E
authors.lastname: Seres
authors.forename: József
authors.initials: J
authors.lastname: Seres
authors.forename: Ferenc
authors.initials: F
authors.lastname: Krausz
authors.forename: Christian
authors.initials: C
authors.lastname: Spielmann
mesh_terms: D006371:Helium / Q000737:chemistry*; D008853:Microscopy / Q000379:methods*; D017785:Photons; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014965:X-Rays
chemical_list: D006371:Helium; D014025:Titanium