Classical analysis of Coulomb effects in strong-field ionization of H2+by intense circularly polarized laser fields

Abstract

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Toolkit for semiclassical computations for strongly driven molecules: Frustrated ionization ofH2driven by elliptical laser fields

“…Our results for H * formation in Fig. 7 b) and d) show that with increasing the two-lobe structure tends to align closer to the minor axis of the field (x-axis in our case) [37,49].…”

“…If the instantaneous field strength at the initial phase φ 0 is larger than the threshold intensity for over-thebarrier ionization, then we assume that electron 1 exits in a direction opposite to the field at a distance r max [37]; r max is the coordinate along the laser field direction where the field-lowered Coulomb potential V (r 1, , t 0 ) is maximum. In addition, we set the magnitude of the momentum of electron 1,p 1 , equal to…”

Molecular photoelectron angular distribution rotations in multi-photon resonant ionization of H2+ by circularly polarized ultraviolet laser pulses

“…The unexpected tilted angle of MPADs is also shown to be sensitive to the pulse wavelength λ, the molecular internuclear distance R, and the symmetry of the initial electronic states. [36][37][38][39] Dependence of MPAD rotations on pulse intensities has also been reported recently. 40,41 In the present work, we study effects of pulse durations on the rotation of MPADs in multi-photon resonant ionization processes by attosecond/sub-femtosecond circularly polarized UV laser pulses from numerical solutions of the time-dependent Schrödinger equation (TDSE) for aligned H + 2 at equilibrium.…”

Photoelectron momentum distributions of the hydrogen molecular ion driven by multicycle near-infrared laser pulses

“…Moreover, the classical trajectory Monte Carlo (CTMC) calculation based on the two-dimensional (2D) model of H + 2 in Ref. [12] showed that the rotation angle ∆θ p also increases with the driving laser intensity. Their findings suggest that the Coulomb asymmetry in molecular PMD is a both structural and dynamical effect.…”

“…Studies of the molecular PMDs in a circularly polarized laser field in the past are based on the 2D H + 2 model, e.g., the CTMC theory in Ref. [12] or the TDSE in Ref. [9].…”