Raman scattering studies of MBE-grown ZnTe nanowires - Archive ouverte HAL
Article Dans Une Revue Materials Science -Wroclaw- Année : 2008

Raman scattering studies of MBE-grown ZnTe nanowires

W. Szuszkiewicz
  • Fonction : Auteur
E. Dynowska
  • Fonction : Auteur
E. Janik
  • Fonction : Auteur
W. H. Zaleszczyk
  • Fonction : Auteur
A. Presz
  • Fonction : Auteur
J. Z. Domagala
  • Fonction : Auteur
W. Caliebe
  • Fonction : Auteur

Résumé

We report on the first studies of the optical properties of MBE-grown ZnTe nanowires (NWs). The growth of ZnTe NWs was based on the Au-catalyzed vapour-liquid-solid mechanism and was performed on (001), (011), or (111)B-oriented GaAs substrates. Investigated NWs have a zinc-blende structure, the average diameter of about 30 nm, and typical length between 1 and 2 mu m. Their growth axes are oriented along < 111 >-type directions of the substrate. The structural characterization of the NWs was performed by means of X-ray diffraction, using the synchrotron radiation corresponding to the wavelength of CuK(alpha 1) radiation W1 beamline at Hasylab DESY). The macro-Raman spectra of either as-grown NWs on GaAs substrate or of NWs removed from substrate and deposited onto Si were collected at temperatures from 15 K to 295 K using Ar(+) and Kr(+) laser lines. Strong enhancement of ZnTe-related LO-phonon structure was found for an excitation close to the exciton energy. Our studies revealed also the presence of small trigonal Te precipitates, typical of tellurium compounds.
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Dates et versions

hal-01287865 , version 1 (14-03-2016)

Identifiants

  • HAL Id : hal-01287865 , version 1

Citer

W. Szuszkiewicz, Jean-François Morhange, E. Dynowska, E. Janik, W. H. Zaleszczyk, et al.. Raman scattering studies of MBE-grown ZnTe nanowires. Materials Science -Wroclaw-, 2008, 26 (4), pp.1053-1059. ⟨hal-01287865⟩
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