title: Frustrated tunnel ionization of noble gas dimers with Rydberg-electron shakeoff by electron charge oscillation.
abstract: Strong field single ionization of homo- and heteronuclear noble gas dimers with ultrashort infrared laser pulses is experimentally investigated. A pronounced photoelectron yield maximum is found for dimers in the momentum range |p|≤0.1  a.u. which is absent for the corresponding monomer. This yield enhancement can be attributed to a new two-step strong field ionization mechanism active only in the dimers. In the first step, frustrated tunnel ionization at one of the atomic centers populates Rydberg states, which then become ionized in a second step through charge oscillation within the dimer ion core.
authors: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max-Born-Straße 2A, D-12489 Berlin, Germany.
authors: A
authors: A
authors: von Veltheim
authors: B
authors: B
authors: Manschwetus
authors: W
authors: W
authors: Quan
authors: B
authors: B
authors: Borchers
authors: G
authors: G
authors: Steinmeyer
authors: H
authors: H
authors: Rottke
authors: W
authors: W
authors: Sandner