title: Low yield of near-zero-momentum electrons and partial atomic stabilization in strong-field tunneling ionization.
abstract: We measure photoelectron angular distributions of single ionization of krypton and xenon atoms by laser pulses at 1320 nm, 0.2-1.0×10(14) W/cm(2), and observe that the yield of near-zero-momentum electrons in the strong-field tunneling ionization regime is significantly suppressed. Semiclassical simulations indicate that this local ionization suppression effect can be attributed to a fraction of the tunneled electrons that are released in a certain window of the initial field phase and transverse velocity are ejected into Rydberg elliptical orbits with a frequency much smaller than that of the laser; i.e., the corresponding atoms are stabilized. These electrons with high-lying atomic orbits are thus prevented from ionization, resulting in the substantially reduced near-zero-momentum electron yield. The refined transition between the Rydberg states of the stabilized atoms has implication on the THz radiation from gas targets in strong laser fields.
authors.affiliation: Department of Physics and State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Liu
authors.forename: Yunquan
authors.initials: Y
authors.lastname: Liu
authors.forename: Libin
authors.initials: L
authors.lastname: Fu
authors.forename: Guoguo
authors.initials: G
authors.lastname: Xin
authors.forename: Difa
authors.initials: D
authors.lastname: Ye
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: X T
authors.initials: XT
authors.lastname: He
authors.forename: Yudong
authors.initials: Y
authors.lastname: Yang
authors.forename: Xianrong
authors.initials: X
authors.lastname: Liu
authors.forename: Yongkai
authors.initials: Y
authors.lastname: Deng
authors.forename: Chengyin
authors.initials: C
authors.lastname: Wu
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong