title: Optimization of attosecond pulse generation.
abstract: The generation of attosecond pulses by superposition of high harmonics relies on their synchronization in the emission. Our experiments in the low-order, plateau, and cutoff regions of the spectrum reveal different regimes in the electron dynamics determining the synchronization quality. The shortest pulses are obtained by combining a spectral filtering of harmonics from the end of the plateau and the cutoff, and a far-field spatial filtering that selects a single electron quantum path contribution to the emission. This method applies to isolated pulses as well as pulse trains.
authors.affiliation: CEA/DSM/DRECAM/SPAM, Centre d'Etudes de Saclay, Gif-sur-Yvette, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Mairesse
authors.forename: A
authors.initials: A
authors.lastname: de Bohan
authors.forename: L J
authors.initials: LJ
authors.lastname: Frasinski
authors.forename: H
authors.initials: H
authors.lastname: Merdji
authors.forename: L C
authors.initials: LC
authors.lastname: Dinu
authors.forename: P
authors.initials: P
authors.lastname: Monchicourt
authors.forename: P
authors.initials: P
authors.lastname: Breger
authors.forename: M
authors.initials: M
authors.lastname: Kovacev
authors.forename: T
authors.initials: T
authors.lastname: Auguste
authors.forename: B
authors.initials: B
authors.lastname: Carré
authors.forename: H G
authors.initials: HG
authors.lastname: Muller
authors.forename: P
authors.initials: P
authors.lastname: Agostini
authors.forename: P
authors.initials: P
authors.lastname: Salières