| Title | Phase-space perspective on the wavelength-dependent electron correlation of strong-field double ionization of Xe |
| Authors | Shao, Yun Yuan, Zongqiang Ye, Difa Fu, Libin Liu, Ming-Ming Sun, Xufei Wu, Chengyin Liu, Jie Gong, Qihuang Liu, Yunquan |
| Affiliation | Peking Univ, Dept Phys, Beijing 100871, Peoples R China. Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China. China Acad Engn Phys, Res Ctr Laser Fus, Sci & Technol Plasma Phys Lab, Mianyang 621900, Peoples R China. Inst Appl Phys & Computat Math, Lab Computat Phys, Beijing 100088, Peoples R China. Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China. Peking Univ, Dept Phys, Beijing 100871, Peoples R China. Liu, YQ (reprint author), Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China. Liu, YQ (reprint author), Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China. |
| Keywords | double ionization electron correlation wavelength-dependent MOMENTUM DISTRIBUTIONS LASER-PULSE RECOIL-ION |
| Issue Date | 2017 |
| Publisher | JOURNAL OF OPTICS |
| Citation | JOURNAL OF OPTICS. 2017, 19(12). |
| Abstract | We measure the wavelength-dependent correlated-electron momentum (CEM) spectra of strong-field double ionization of Xe atoms, and observe a significant change from a roughly nonstructured (uncorrelated) pattern at 795 nm to an elongated distribution with V-shaped structure (correlated) at higher wavelengths of 1320 and 1810 nm, pointing to the transition of the ionization dynamics imprinted in the momentum distributions. These observations are well reproduced by a semiclassical model using Green-Sellin-Zachor potential to take into account the screening effect. We show that the momentum distribution of Xe2+ undergoes a bifurcation structure emerging from single-hump to double-hump structure as the laser wavelength increases, which is dramatically different from that of He2+, indicating the complex multi-electron effect. By back analyzing the double ionization trajectories in the phase space (the initial transverse momentum and the laser phase at the tunneling exit) of the first tunneled electrons, we provide deep insight into the physical origin for electron correlation dynamics. We find that a random distribution in phase-space is responsible for a less distinct structured CEM spectrum at shorter wavelength. While increasing the laser wavelength, a topology-invariant pattern in phase-space appears, leading to the clearly visible V-shaped structures. |
| URI | http://hdl.handle.net/20.500.11897/497553 |
| ISSN | 2040-8978 |
| DOI | 10.1088/2040-8986/aa9249 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 物理学院 人工微结构和介观物理国家重点实验室 |
