The ionization dynamics of dilute atomic gases induced by ultra-short high-intensity optical-pulse excitation is treated fully microscopically. The optical excitation is self-consistently coupled to the many-body interactions of the electrons, including their interactions with free electrons, ions, and neutral atoms. The theory is numerically evaluated for the example of a gas of hydrogen atoms for a broad range of pulses covering the tunnel ionization, multi-photon ionization, as well as the one-photon ionization regimes. It is shown that the many-body effects during the excitation distinctly influence the atomic ionization dynamics. The ionization degree after the pulse is dominated by the dephasing caused by the excitation-dependent interplay between the purely optical processes and the many-body interactions.
|Original language||English (US)|
|Number of pages||8|
|Journal||Journal of the Optical Society of America B: Optical Physics|
|State||Published - 2015|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Statistical and Nonlinear Physics