title: Coherent continuum extreme ultraviolet radiation in the sub-100-nJ range generated by a high-power many-cycle laser field.
abstract: High-energy coherent continuum radiation is generated by the interaction of rare gases with a high-power many-cycle laser field, utilizing the interferometric polarization gating technique. A narrow temporal gate is formed in the laser pulse within which the extreme ultraviolet (XUV) emission is restricted. An analytical expression for the gate function is derived. A super-XUV continuum down to 15 nm, broad enough to support synthesis of single pulses of 260 as duration and a few tens of nanojoule energy, has been measured. These results directly challenge the perspectives of single-attosecond pulse XUV-pump-XUV-probe applications.
authors.affiliation: Foundation for Research and Technology, Hellas Institute of Electronic Structure and Laser, P.O. Box 1527, GR711 10 Heraklion, Crete, Greece.
authors.forename: E
authors.initials: E
authors.lastname: Skantzakis
authors.forename: P
authors.initials: P
authors.lastname: Tzallas
authors.forename: J
authors.initials: J
authors.lastname: Kruse
authors.forename: C
authors.initials: C
authors.lastname: Kalpouzos
authors.forename: D
authors.initials: D
authors.lastname: Charalambidis