Anisotropic photoemission time delays close to a Fano resonance

Research output: Contribution to journalArticle


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.


  • Claudio Cirelli
  • Carlos Marante
  • Sebastian Heuser
  • C. L.M. Petersson
  • Álvaro Jiménez Galán
  • Luca Argenti
  • Marcus Isinger
  • Saikat Nandi
  • Linnea Rading
  • Matteo Lucchini
  • Lukas Gallmann
  • Eva Lindroth
  • Fernando Martín
  • Ursula Keller
External organisations
  • ETH Zürich
  • Swiss Federal Laboratories for Materials Science and Technology
  • Autonomous University of Madrid
  • Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
  • Polytechnic University of Milan
  • Stockholm University
  • IMDEA Nanociencia
  • University of Central Florida
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Article number955
JournalNature Communications
Issue number1
Publication statusPublished - 2018 Dec 1
Publication categoryResearch