Time-resolved ionization of the hydrogen atom in strong laser fields

28th International Conference on Photonic, Electronic and Atomic Collisions

Cui, Sen^1 ; He, Feng^1

Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiaotong University, Shanghai

200240, China^1

关键词: Angular frequencies;    Energy distributions;    Energy spectra;    Ionized electrons;    Single photon ionization;    Strong laser field;    Strong-field approximations;    Time evolutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032048/pdf
DOI  :  10.1088/1742-6596/488/3/032048

来源: IOP

【 摘 要 】

We use the strong field approximation to study the single-photon ionization of the hydrogen atom in the time domain. During the interaction of the laser pulse and the atom, the electron is pumped to the Volkov state and has a widely energy distribution at the beginning of the laser pulse. With the time evolution, only the photon-electron with the energy Pω - Ipis survived, where ω is the laser angular frequency, and Ipis the ionization potential of the atom. Therefore we observed how the energy spectrum of the ionized electron builds in the time domain.