Anisotropic photoemission time delays close to a Fano resonance

Claudio Cirelli (), Carlos Marante, Sebastian Heuser, C. L. M. Petersson, Álvaro Jiménez Galán, Luca Argenti, Shiyang Zhong, David Busto, Marcus Isinger, Saikat Nandi, Sylvain Maclot, Linnea Rading, Per Johnsson, Mathieu Gisselbrecht, Matteo Lucchini, Lukas Gallmann, J. Marcus Dahlström, Eva Lindroth, Anne L’Huillier, Fernando Martín and Ursula Keller
Additional contact information
Claudio Cirelli: ETH Zurich
Carlos Marante: Módulo 13, Universidad Autónoma de Madrid
Sebastian Heuser: ETH Zurich
C. L. M. Petersson: Módulo 13, Universidad Autónoma de Madrid
Álvaro Jiménez Galán: Módulo 13, Universidad Autónoma de Madrid
Luca Argenti: Módulo 13, Universidad Autónoma de Madrid
Shiyang Zhong: Lund University
David Busto: Lund University
Marcus Isinger: Lund University
Saikat Nandi: Lund University
Sylvain Maclot: Lund University
Linnea Rading: Lund University
Per Johnsson: Lund University
Mathieu Gisselbrecht: Lund University
Matteo Lucchini: ETH Zurich
Lukas Gallmann: ETH Zurich
J. Marcus Dahlström: Stockholm University, AlbaNova University Center
Eva Lindroth: Stockholm University, AlbaNova University Center
Anne L’Huillier: Lund University
Fernando Martín: Módulo 13, Universidad Autónoma de Madrid
Ursula Keller: ETH Zurich

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Electron correlation and multielectron effects are fundamental interactions that govern many physical and chemical processes in atomic, molecular and solid state systems. The process of autoionization, induced by resonant excitation of electrons into discrete states present in the spectral continuum of atomic and molecular targets, is mediated by electron correlation. Here we investigate the attosecond photoemission dynamics in argon in the 20–40 eV spectral range, in the vicinity of the 3s−1np autoionizing resonances. We present measurements of the differential photoionization cross section and extract energy and angle-dependent atomic time delays with an attosecond interferometric method. With the support of a theoretical model, we are able to attribute a large part of the measured time delay anisotropy to the presence of autoionizing resonances, which not only distort the phase of the emitted photoelectron wave packet but also introduce an angular dependence.

Date: 2018
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DOI: 10.1038/s41467-018-03009-1

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