title: Subcycle control of electron-electron correlation in double ionization.
abstract: Double ionization of neon with orthogonally polarized two-color (OTC) laser fields is investigated using coincidence momentum imaging. We show that the two-electron emission dynamics in nonsequential double ionization can be controlled by tuning the subcycle shape of the electric field of the OTC pulses. We demonstrate experimentally switching from correlated to anticorrelated two-electron emission, and control over the directionality of the two-electron emission. Simulations based on a semiclassical trajectory model qualitatively explain the experimental results by a subcycle dependence of the electron recollision time on the OTC field shape.
authors.affiliation: Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Xie
authors.affiliation: Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Roither
authors.affiliation: School of Physics, Huazhong University of Science and Technology, and Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China and Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, Wuhan 430074, China.
authors.forename: Yueming
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: School of Physics, Huazhong University of Science and Technology, and Wuhan National Laboratory for Optoelectronics, Wuhan 430074, China and Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education, Wuhan 430074, China.
authors.forename: Peixiang
authors.initials: P
authors.lastname: Lu
authors.affiliation: Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Daniil
authors.initials: D
authors.lastname: Kartashov
authors.affiliation: Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Markus
authors.initials: M
authors.lastname: Schöffler
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Dror
authors.initials: D
authors.lastname: Shafir
authors.affiliation: Joint Laboratory for Attosecond Science of the National Research Council and the University of Ottawa, Ottawa, Ontario, Canada K1A 0R6.
authors.forename: Paul B
authors.initials: PB
authors.lastname: Corkum
authors.affiliation: Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Andrius
authors.initials: A
authors.lastname: Baltuška
authors.affiliation: Joint Laboratory for Attosecond Science of the National Research Council and the University of Ottawa, Ottawa, Ontario, Canada K1A 0R6.
authors.forename: André
authors.initials: A
authors.lastname: Staudte
authors.affiliation: Photonics Institute, Vienna University of Technology, A-1040 Vienna, Austria.
authors.forename: Markus
authors.initials: M
authors.lastname: Kitzler