title: Attosecond Coherent Control of Single and Double Photoionization in Argon.
abstract: Ultrafast high harmonic beams provide new opportunities for coherently controlling excitation and ionization processes in atoms, molecules, and materials on attosecond time scales by employing multiphoton two-pathway electron-wave-packet quantum interferences. Here we use spectrally tailored and frequency tuned vacuum and extreme ultraviolet harmonic combs, together with two phase-locked infrared laser fields, to show how the total single and double photoionization yields of argon can be coherently modulated by controlling the relative phases of both optical and electronic-wave-packet quantum interferences. This Letter is the first to apply quantum control techniques to double photoionization, which is a fundamental process where a single, high-energy photon ionizes two electrons simultaneously from an atom.
authors.affiliation: JILA and Department of Physics, University of Colorado and NIST, Boulder, Colorado 80309, USA.
authors.forename: C W
authors.initials: CW
authors.lastname: Hogle
authors.affiliation: Division of Materials Science, Faculty of Pure and Applied Science, University of Tsukuba, Ibaraki 305-8573, Japan.
authors.forename: X M
authors.initials: XM
authors.lastname: Tong
authors.affiliation: JILA and Department of Physics, University of Colorado and NIST, Boulder, Colorado 80309, USA.
authors.forename: L
authors.initials: L
authors.lastname: Martin
authors.affiliation: JILA and Department of Physics, University of Colorado and NIST, Boulder, Colorado 80309, USA.
authors.forename: M M
authors.initials: MM
authors.lastname: Murnane
authors.affiliation: JILA and Department of Physics, University of Colorado and NIST, Boulder, Colorado 80309, USA.
authors.forename: H C
authors.initials: HC
authors.lastname: Kapteyn
authors.affiliation: JILA and Department of Physics, University of Colorado and NIST, Boulder, Colorado 80309, USA.|Lawrence Berkeley National Lab,1 Cyclotron Road, Berkeley, California 94720, USA.|ELI-ALPS, ELI-Hu Nkft, Dugonics ter 13, Szeged H6720, Hungary.
authors.forename: P
authors.initials: P
authors.lastname: Ranitovic