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Volume 228, 2021

Attosecond laser control of photoelectron angular distributions in XUV-induced ionization of H2

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Abstract

We investigate how attosecond XUV pump/IR probe schemes can be used to exert control on the ionization dynamics of the hydrogen molecule. The aim is to play with all available experimental parameters in the problem, namely the XUV pump–IR probe delay, the energy and emission direction of the produced photo-ions, as well as combinations of them, to uncover control strategies that can lead to preferential electron ejection directions. We do so by accurately solving the time-dependent Schrödinger equation, with inclusion of both electronic and nuclear motions, as well as the coupling between them. We show that both the IR pulse and the nuclear motion can be used to break the molecular inversion symmetry, thus leading to asymmetric molecular-frame photoelectron angular distributions. The preferential electron emission direction can thus be tuned by varying the pump–probe delay, by choosing specific ranges of proton kinetic energies, or both. We expect that similar control strategies could be used in more complex molecules containing light nuclei.

Graphical abstract: Attosecond laser control of photoelectron angular distributions in XUV-induced ionization of H2

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Supplementary files

Article information


Submitted
02 Oct 2020
Accepted
05 Nov 2020
First published
11 Nov 2020

Faraday Discuss., 2021,228, 378-393
Article type
Paper

Attosecond laser control of photoelectron angular distributions in XUV-induced ionization of H2

R. Y. Bello, F. Martín and A. Palacios, Faraday Discuss., 2021, 228, 378 DOI: 10.1039/D0FD00114G

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