title: Isolated attosecond pulses using a detuned second-harmonic field.
abstract: Calculations are presented for the generation of an isolated attosecond pulse in a multicycle two-color strong-field regime. We show that the recollision of the electron wave packet can be confined to half an optical cycle using pulses of up to 40 fs in duration. The scheme is proven to be efficient using two intense beams, one producing a strong field at omega and the other a strong field detuned from 2omega. The slight detuning deltaomega of the second harmonic is used to break the symmetry of the electric field over many optical cycles and provides a coherent control for the formation of an isolated attosecond pulse.
authors.affiliation: Service des Photons Atomes et Molécules, Centre d'Etudes de Saclay, Gif sur Yvette, France. merdji@drecam.cea.fr
authors.forename: Hamed
authors.initials: H
authors.lastname: Merdji
authors.forename: Thierry
authors.initials: T
authors.lastname: Auguste
authors.forename: Willem
authors.initials: W
authors.lastname: Boutu
authors.forename: J-Pascal
authors.initials: JP
authors.lastname: Caumes
authors.forename: Bertrand
authors.initials: B
authors.lastname: Carré
authors.forename: Thomas
authors.initials: T
authors.lastname: Pfeifer
authors.forename: Aurélie
authors.initials: A
authors.lastname: Jullien
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Neumark
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Leone