Transient Dielectric Function of Fs-Laser Excited Bismuth

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Abstract

We present time-resolved dual-angle single-wavelength pump-probe study of the reflectivity of femtosecond laser excited bismuth crystal. The recovered real and imaginary parts of the dielectric function show complex a transition to a new quasi-stable excited state at about 20 ps. This state lasts for about 4 ns after the excitation and is not an intermediate state between the solid and the liquid phase. The results suggest that the photo-excited state does not correspond to neither a warm nor a liquid phase, and open general questions on photoexcited phase transition.

Original languageEnglish
Title of host publicationSpringer Series in Chemical Physics
PublisherSpringer Science and Business Media Deutschland GmbH
Pages217-219
Number of pages3
DOIs
Publication statusPublished - 1 Jan 2009

Publication series

NameSpringer Series in Chemical Physics
Volume92
ISSN (Print)0172-6218

Keywords

  • Coherent Oscillation
  • Coherent Phonon
  • Dielectric Function
  • European Contract
  • Study Lattice Dynamic

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