title: Attosecond pulse trains generated using two color laser fields.
abstract: We investigate the spectral and temporal structure of high harmonic emission from argon exposed to an infrared laser field and its second harmonic. For a wide range of generating conditions, trains of attosecond pulses with only one pulse per infrared cycle are generated. The synchronization necessary for producing such trains ensures that they have a stable pulse-to-pulse carrier envelope phase, unlike trains generated from one color fields, which have two pulses per cycle and a pi phase shift between consecutive pulses. Our experiment extends the generation of phase stabilized few cycle pulses to the extreme ultraviolet regime.
authors.affiliation: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001, USA.
authors.forename: J
authors.initials: J
authors.lastname: Mauritsson
authors.forename: P
authors.initials: P
authors.lastname: Johnsson
authors.forename: E
authors.initials: E
authors.lastname: Gustafsson
authors.forename: A
authors.initials: A
authors.lastname: L'Huillier
authors.forename: K J
authors.initials: KJ
authors.lastname: Schafer
authors.forename: M B
authors.initials: MB
authors.lastname: Gaarde