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Picosecond dynamics of laser-induced strain in graphite

In English

Författare

  • Maher Harb
  • Andrius Jurgilaitis
  • Henrik Enquist
  • Ralf Nüske
  • C. v. Korff Schmising
  • J. Gaudin
  • S. L. Johnson
  • C. J. Milne
  • P. Beaud
  • E. Vorobeva
  • A. Caviezel
  • S. O. Mariager
  • G. Ingold
  • Jörgen Larsson
Visa allt

Summary, in English

We report on the use of grazing-incidence time-resolved x-ray diffraction to investigate the evolution of strain in natural graphite excited by femtosecond-laser pulses in the fluence range of 6-35 mJ/cm(2). Strains corresponding to up to similar to 2.8% c-axis expansion were observed. We show that the experimental data is in good agreement with calculations based on the Thomsen strain model in conjunction with dynamical diffraction theory. Furthermore we find no evidence of nonthermal lattice expansion as reported in recent ultrafast electron-diffraction studies of laser-excited graphite conducted under comparable excitation conditions.

Publiceringsår

2011

Språk

Engelska

Publikation/Tidskrift/Serie

Physical Review B (Condensed Matter and Materials Physics)

Volym

84

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

American Physical Society

Ämne

  • Physical Sciences
  • Atom and Molecular Physics and Optics
  • Natural Sciences

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1098-0121