Interplay of electron heating and saturable absorption in ultrafast extreme ultraviolet transmission of condensed matter

Andrea Di Cicco*, Keisuke Hatada, Erika Giangrisostomi, Roberto Gunnella, Filippo Bencivenga, Emiliano Principi, Claudio Masciovecchio, Adriano Filipponi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

High intensity pulses obtained by modern extreme ultraviolet (EUV) and x-ray photon sources allows the observation of peculiar phenomena in condensed matter. Experiments performed at the Fermi@Elettra FEL-1 free-electron-laser source at 23.7, 33.5, and 37.5 eV on Al thin films, for an intermediate-fluence range up to about 20J/cm2, show evidence for a nonmonotonic EUV transmission trend. A decreasing transmission up to about 5-10J/cm2 is followed by an increase at higher fluence, associated with saturable absorption effects. The present findings are interpreted within a simplified three-channel model, showing that an account of the interplay between ultrafast electron heating and saturation effects is required to explain the observed transmission trend.

Original languageEnglish
Article number220303
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number22
DOIs
StatePublished - 2014/12/15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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