Sensitivity of nonlinear photoionization to resonance substructure in collective excitation

Mazza, Tommaso, 1979-; Karamatskou, Antonia; Ilchen, Markus; Bakhtiarzadeh, Sadegh; Rafipoor, Amir Jones; O'Keeffe, Patrick; Kelly, Thomas J. (Physicist); Walsh, Nichola; Costello, John T.; Meyer, Michael; Santra, Robin

Physical sciences; Atomic and molecular physics
2015

Journal article


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Abstract

Collective behaviour is a characteristic feature in many-body systems, important for developments in fields such as magnetism, superconductivity, photonics and electronics. Recently, there has been increasing interest in the optically nonlinear response of collective excitations. Here we demonstrate how the nonlinear interaction of a many-body system with intense XUV radiation can be used as an effective probe for characterizing otherwise unresolved features of its collective response. Resonant photoionization of atomic xenon was chosen as a case study. The excellent agreement between experiment and theory strongly supports the prediction that two distinct poles underlie the giant dipole resonance. Our results pave the way towards a deeper understanding of collective behaviour in atoms, molecules and solid-state systems using nonlinear spectroscopic techniques enabled by modern short-wavelength light sources.

Publisher
The University of Hull
Peer reviewed
Yes
Language
English
Extent
529 KB
Identifier
hull:13542

Journal

Journal title
Nature communications
Publication date
2015
Publisher
Nature publishing group
DOI
10.1038/ncomms7799
ISSN (Electronic)
2041-1723
Volume
6
Start page
6799-1
End page
6799-6
Notes

This is a copy of an open access article published in Nature communications, 2016, v.6.

Link
Published article
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