title: Nonsequential double ionization with mid-infrared laser fields.
abstract: Using a full-dimensional Monte Carlo classical ensemble method, we present a theoretical study of atomic nonsequential double ionization (NSDI) with mid-infrared laser fields, and compare with results from near-infrared laser fields. Unlike single-electron strong-field processes, double ionization shows complex and unexpected interplays between the returning electron and its parent ion core. As a result of these interplays, NSDI for mid-IR fields is dominated by second-returning electron trajectories, instead of first-returning trajectories for near-IR fields. Some complex NSDI channels commonly happen with near-IR fields, such as the recollision-excitation-with-subsequent-ionization (RESI) channel, are virtually shut down by mid-IR fields. Besides, the final energies of the two electrons can be extremely unequal, leading to novel e-e momentum correlation spectra that can be measured experimentally.
authors.affiliation: National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Ying-Bin
authors.initials: YB
authors.lastname: Li
authors.affiliation: Deparment of Physics, Kansas State University, Manhattan, KS 66506, USA.
authors.forename: Xu
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China.
authors.forename: Ben-Hai
authors.initials: BH
authors.lastname: Yu
authors.affiliation: College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China.
authors.forename: Qing-Bin
authors.initials: QB
authors.lastname: Tang
authors.affiliation: National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Guang-Hou
authors.initials: GH
authors.lastname: Wang
authors.affiliation: National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: Wan