Looking inside the tunnelling barrier: I. Strong field ionisation from orbitals with high angular momentum in circularly polarised fields

Kaushal J, Smirnova O (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Journal of Physics B: Atomic, Molecular and Optical Physics

Book Volume: 51

Article Number: 174001

Journal Issue: 17

DOI: 10.1088/1361-6455/aad130

Abstract

Here and in the two companion papers we use time-dependent analytical R-Matrix (ARM) theory to consider the impact of electron-core interaction on (i) sensitivity of strong field ionisation to the sense of electron rotation in the initial state and (ii) electron spin polarisation. ARM is a rigorous approach to strong field ionisation that takes advantage of the semiclassical nature of electron dynamics in strong laser fields and naturally incorporates complex-valued classical trajectories in the time-propagation. While the appearance of complex time is associated with optical tunnelling, complex coordinates reflect non-adiabaticity of the electron response to the strong laser field. We focus on non-adiabatic electron-core interaction in the sub-barrier region and show how it affects ionisation from orbitals with high angular momentum ℓ = 2, 3 in multiply charged atomic ions with strong electron-core interaction. In this paper we discuss sub-cycle ionisation yields, while in the companion papers we focus on the effects of the long-range core potential on the 'initial conditions' (from the ARM perspective, companion paper II) for the photo electron as it emerges from the classically forbidden region and on the spin polarisation of the ejected electron (companion paper III).

Involved external institutions

Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V. / Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy

Germany (DE)

How to cite

APA:

Kaushal, J., & Smirnova, O. (2018). Looking inside the tunnelling barrier: I. Strong field ionisation from orbitals with high angular momentum in circularly polarised fields. Journal of Physics B: Atomic, Molecular and Optical Physics, 51(17). https://doi.org/10.1088/1361-6455/aad130

MLA:

Kaushal, Jivesh, and Olga Smirnova. "Looking inside the tunnelling barrier: I. Strong field ionisation from orbitals with high angular momentum in circularly polarised fields." Journal of Physics B: Atomic, Molecular and Optical Physics 51.17 (2018).

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