Triple ionization and "frustrated" triple ionization in triatomic molecules driven by intense laser fields

Abstract

We formulate a three-dimensional semi-classical model to treat three-electron escape dynamics in a strongly-driven linear triatomic molecule, HeH${}_2^{+}$. Our model includes the Coulomb singularities. Hence, to avoid unphysical autoionization, we employ two criteria to switch off the Coulomb repulsive force between two bound electrons and switch it on when the motion of one electron is mostly determined by the laser field. We investigate triple and "frustrated" triple ionization. In the latter process two electrons escape while one electron remains bound in a Rydberg state. We find that two pathways prevail in "frustrated" triple ionization, as in "frustrated" double ionization. We also find that the electron that remains in a Rydberg state is more likely to be attached to He${}^{2+}$ compared to H${}^{+}$. Our results indicate that in triple and "frustrated" triple ionization electronic correlation is weak. Moreover, we compute the sum of the kinetic energies as well as the angular patterns of the final ion fragments in triple and "frustrated" triple ionization. These patterns suggest that the fragmenting molecule deviates from its initial linear configuration.

arXiv comment7 pages, 4 figures

References in corpus (18)

• Classical collisional trajectories as the source of strong-field double ionization of helium in the knee regime
• Correlated electron emission in laser-induced nonsequence double ionization of Helium
• Recoil collisions as a portal to field assisted ionization at near-UV frequencies in the Strong Field Double Ionization of Helium
• Two-electron effects pervading the formation of highly excited neutral atoms in the break-up of strongly driven H${}_2$
• Photoionization of few electron systems with a hybrid Coupled Channels approach
• Double photo-electron momentum spectra of Helium at infrared wavelength
• Non-sequential triple ionization in strong fields
• The Coulomb four-body problem in a classical framework: Triple photoionization of lithium
• A toolkit for semiclassical computations for strongly-driven molecules: "frustrated" ionization of H${}_2$ driven by elliptical laser fields
• Localizing High-Lying Rydberg Wave Packets with Two-Color Laser Fields
• Evidence for a {\bf T}-shape break-up pattern in the triple photoionization of Li
• Frustrated double ionization in two-electron triatomic molecules
• Ab initio study of time-dependent dynamics in strong-field triple ionization
• Controlling electron-electron correlation in frustrated double ionization of molecules with orthogonally polarized two-color laser fields
• Enhancing frustrated double ionisation with no electronic correlation in triatomic molecules using counter-rotating two-color circular laser fields
• Strong-field ionization of atoms with $p^3$ valence shell: Two versus three active electrons
• Frustrated double and single ionization in a two-electron triatomic molecule H${}_3^{+}$
• Intertwined electron-nuclear motion in frustrated double ionization in driven heteronuclear molecules

Cited by in corpus (2)

• A general model and toolkit for the ionization of three or more electrons in strongly driven atoms using an effective Coulomb potential for the interaction between bound electrons
• Three-electron correlations in strong laser field ionization: Spin induced effects