Attosecond photoionisation time delays reveal the anisotropy of the molecular potential in the recoil frame

H. Ahmadi, E. Plésiat, M. Moioli, F. Frassetto, L. Poletto, P. Decleva, C. D. Schröter, T. Pfeifer, R. Moshammer, A. Palacios, F. Martin () and G. Sansone ()
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H. Ahmadi: Albert-Ludwigs-Universität
E. Plésiat: Universidad Autónoma de Madrid, Facultad de Ciencias Cantoblanco
M. Moioli: Albert-Ludwigs-Universität
F. Frassetto: CNR-IFN
L. Poletto: CNR-IFN
P. Decleva: CNR IOM and Universitá di Trieste
C. D. Schröter: Max-Planck-Institut für Kernphysik
T. Pfeifer: Max-Planck-Institut für Kernphysik
R. Moshammer: Max-Planck-Institut für Kernphysik
A. Palacios: Universidad Autónoma de Madrid, Facultad de Ciencias Cantoblanco
F. Martin: Universidad Autónoma de Madrid, Facultad de Ciencias Cantoblanco
G. Sansone: Albert-Ludwigs-Universität

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: Abstract Photoionisation time delays carry structural and dynamical information on the target system, including electronic correlation effects in atoms and molecules and electron transport properties at interfaces. In molecules, the electrostatic potential experienced by an outgoing electron depends on the emission direction, which should thus lead to anisotropic time delays. To isolate this effect, information on the orientation of the molecule at the photoionisation instant is required. Here we show how attosecond time delays reflect the anisotropic molecular potential landscape in CF4 molecules. The variations in the measured delays can be directly related to the different heights of the potential barriers that the outgoing electrons see in the vicinity of shape resonances. Our results indicate the possibility to investigate the spatial characteristics of the molecular potential by mapping attosecond photoionisation time delays in the recoil-frame.

Date: 2022
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DOI: 10.1038/s41467-022-28783-x

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