Персона: Ломоносова, Татьяна Александровна
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On the Possibility to Observe Collective Tunneling in Ionization of Atoms by Intense Laser Fields
© 2021, Pleiades Publishing, Inc.The shape of momentum distributions of doubly charged ions emerging in the process of ionization of atoms in an intense low-frequency circularly polarized laser field is discussed. Two possible channels of ionization—sequential and collective tunneling—are shown to lead to qualitatively different momentum distributions of the ions. Obtained results can be used for experimental search of the collective tunneling effect in atoms.
Frustrated ionization of atoms in the multiphoton regime
© 2020 Astro Ltd.A semiclassical analytic theory which describes the excitation of atomic Rydberg states by intense laser radiation is formulated in the multiphoton limit of ionization. The theory is based on the separation of the electron motion in fast oscillations in the laser field and slow scattering in the Coulomb field of the nucleus. It allows one to calculate classical cut-off positions in the distribution of excited atoms in principal and orbital quantum numbers, and to identify the effect of quantum interference.