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Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Secondary electron imaging of nanostructures using Extreme Ultra-Violet attosecond pulse trains and Infra-Red femtosecond pulses

Author

  • Erik Mårsell
  • Cord Arnold
  • Eleonora Lorek
  • Diego Guenot
  • Thomas Fordell
  • Miguel Miranda
  • Johan Mauritsson
  • Hongxing Xu
  • Anne L'Huillier
  • Anders Mikkelsen

Summary, in English

Surface electron dynamics unfold at time and length scales down to attoseconds and nanometres, making direct imaging with extreme spatiotemporal resolution highly desirable. However, this has turned out to be a major challenge even with the advent of reliable attosecond light sources. In this paper, photoelectrons from Ag nanowires and nanoparticles excited by extreme ultraviolet (XUV) attosecond pulse trains and infrared femtosecond pulses using a PhotoEmission Electron Microscope (PEEM) are imaged. In addition, the samples were investigated using Scanning Electron Microscopy (SEM) and synchrotron based X-ray photoelectron spectroscopy (XPS). To achieve contrast between the nanostructures and the substrate in the XUV images, three different substrate materials were investigated: Cr, ITO and Au. While plasmonic field enhancement can be observed on all three substrates, only on Au substrates do the Ag nanowires appear significantly brighter than the substrate in XUV-PEEM imaging. 3-photon photoemission imaging of plasmonic hot-spots was performed where the autocorrelation trace is observed in the interference signal between two femtosecond Infra-Red (IR) beams with sub-cycle precision. Finally, using Monte Carlo simulations, it is shown how the secondary electrons imaged in the XUV PEEM can potentially reveal information on the attosecond time scale from the near surface region of the nanostructures.

Department/s

  • Synchrotron Radiation Research
  • Atomic Physics
  • Solid State Physics
  • NanoLund

Publishing year

2013

Language

English

Pages

162-170

Publication/Series

Annalen der Physik

Volume

525

Issue

1-2

Document type

Journal article

Publisher

John Wiley and Sons

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • PEEM
  • attosecond
  • nanostructure
  • PhotoEmission
  • microscopy
  • XUV
  • IR

Status

Published

ISBN/ISSN/Other

  • ISSN: 0003-3804