Projects per year
Abstract
We describe an ab initio and nonperturbative R-matrix with time-dependence theory for ultrafast atomic processes in light fields of arbitrary polarization. The theory is applicable to complex, multielectron atoms and atomic ions subject to ultrashort (particularly few-femtosecond and attosecond) laser pulses with any given ellipticity, and it generalizes previous time-dependent R-matrix techniques restricted to linearly polarized fields. We discuss both the fundamental equations, required to propagate the multielectron wave function in time, as well as the computational developments necessary for their efficient numerical solution. To verify the accuracy of our approach, we investigate the two-photon ionization of He, irradiated by a pair of time-delayed, circularly polarized, femtosecond laser pulses, and compare photoelectron momentum distributions, in the polarization plane, with those obtained from recent time-dependent close-coupling calculations. The predictive capabilities of our approach are further demonstrated through a study of single-photon detachment from F− in a circularly polarized, femtosecond laser pulse, where the relative contribution of the co- and counter-rotating 2p electrons is quantified.
Original language | English |
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Article number | 053442 |
Number of pages | 15 |
Journal | Physical Review A (Atomic, Molecular, and Optical Physics) |
Volume | 98 |
DOIs | |
Publication status | Published - 29 Nov 2018 |
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Dive into the research topics of 'R-matrix-with-time-dependence theory for ultrafast atomic processes in arbitrary light fields'. Together they form a unique fingerprint.Projects
- 1 Finished
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R1728TCP: R-matrix Suites for Multielectron Attosecond Dynamics in Atoms and Molecules Irradiated by Arbitrarily Polarised Light
Van Der Hart, H. (PI) & Brown, A. (CoI)
08/05/2017 → 28/02/2020
Project: Research
Datasets
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Electron vortices in He and F-
Brown, A. (Creator), Clarke, D. (Creator), Van Der Hart, H. (Creator) & Armstrong, G. (Creator), Queen's University Belfast, 25 Oct 2018
DOI: 10.17034/668e9c0f-a1f1-4d48-b982-56b375c2fb93
Dataset
File
Student theses
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Ultrafast Atomic Dynamics in Arbitrary Light Fields
Clarke, D. (Author), Van Der Hart, H. (Supervisor) & Brown, A. (Supervisor), Jul 2020Student thesis: Doctoral Thesis › Doctor of Philosophy
File
Profiles
Research output
- 41 Citations
- 1 Software
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The R-matrix with time dependence (RMT) code
Brown, A. (Developer), Van Der Hart, H. (Developer), Armstrong, G. (Developer), Wragg, J. (Developer), Clarke, D. (Developer), Gorfinkiel, J. (Developer), Benda, J. (Developer) & Masin, Z. (Developer), 11 Nov 2019Research output: Non-textual form › Software