Ionisation of hydrogen molecule in intense ultrashort laser pulses: parallel versus perpendicular orientation

Abstract

A theoretical comparison of the electronic excitation and ionisation behaviour of molecular hydrogen oriented either parallel or perpendicular to a linear polarised laser pulse is performed. The investigation is based on a non-perturbative treatment that solves the full time-dependent Schrödinger equation of both correlated electrons within the fixed-nuclei approximation and the dipole. Results are shown for two different laser pulse lengths and intensities as well as for a large variety of photon frequencies starting in the 1- and reaching into the 6-photon regime. In order to investigate the influence of the intrinsic diatomic two-center problem even further, two values of the internuclear separation and a newly developed atomic model are considered.

18 pages, 7 figures

References in corpus (2)

• Molecular orbitals and strong-field approximation
• Non-adiabatic quantum molecular dynamics: Ionization of many electron systems

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• Break-down of the single-active-electron approximation for one-photon ionization of the B ${}^1{\Sigma }_u^{+}$ state of H${}_2$ exposed to intense laser fields
• Shapes of leading tunnelling trajectories for single-electron molecular ionization
• Collisions of low-energy antiprotons with molecular hydrogen: ionization, excitation and stopping power
• A Review on Ab Initio Approaches for Multielectron Dynamics
• Applications of Adiabatic Approximation to One- and Two-electron Phenomena in Strong Laser Fields