Coherent multidimensional photoelectron spectroscopy of ultrafast quasiparticle dressing by light.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
06 May 2020
06 May 2020
Historique:
received:
23
01
2020
accepted:
14
04
2020
entrez:
8
5
2020
pubmed:
8
5
2020
medline:
8
5
2020
Statut:
epublish
Résumé
Depending on the applied strength, electromagnetic fields in electronic materials can induce dipole transitions between eigenstates or distort the Coulomb potentials that define them. Between the two regimes, they can also modify the electronic properties in more subtle ways when electron motion becomes governed by time and space-periodic potentials. The optical field introduces new virtual bands through Floquet engineering that under resonant conditions interacts strongly with the preexisting bands. Under such conditions the virtual bands can become real, and real ones become virtual as the optical fields and electronic band dispersions entangle the electronic response. We reveal optical dressing of electronic bands in a metal by exciting four-photon photoemission from the Cu(111) surface involving a three-photon resonant transition from the Shockley surface band to the first image potential band. Attosecond resolved interferometric scanning between identical pump-probe pulses and its Fourier analysis reveal how the optical field modifies the electronic properties of a solid through combined action of dipole excitation and field dressing.
Identifiants
pubmed: 32376985
doi: 10.1038/s41467-020-16064-4
pii: 10.1038/s41467-020-16064-4
pmc: PMC7203103
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2230Subventions
Organisme : DOE | SC | Basic Energy Sciences (BES)
ID : DE-SC0002313
Organisme : Alexander von Humboldt-Stiftung (Alexander von Humboldt Foundation)
ID : Feodor Lynen Fellowship
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