title: Generation of high-order harmonics with ultra-short pulses from filamentation.
abstract: 7-fs-pulses with 0.3 mJ are obtained after filamentation in argon and compression by double-chirped-mirrors. These pulses are used to generate high-order harmonics in a semi-infinite gas cell in different noble gases. Spectral broadening of high-order harmonics in xenon and argon is observed. In neon, an extended continuous cut-off region down to 10 nm (124 eV) is observed which is to the best of our knowledge the highest cut-off energy obtained by filamented pulses. Our result suggests the feasibility of single attosecond-pulse-generation at both high photon flux and high cut-off energy.
authors.affiliation: Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, D-30167 Hannover, Germany. steingrube@iqo.uni-hannover.de
authors.forename: Daniel S
authors.initials: DS
authors.lastname: Steingrube
authors.forename: Emilia
authors.initials: E
authors.lastname: Schulz
authors.forename: Thomas
authors.initials: T
authors.lastname: Binhammer
authors.forename: Tobias
authors.initials: T
authors.lastname: Vockerodt
authors.forename: Uwe
authors.initials: U
authors.lastname: Morgner
authors.forename: Milutin
authors.initials: M
authors.lastname: Kovacev