Short-range order around Er3+ in silica waveguides containing Aluminium, Titanium and Hafnium (Articolo in rivista)

Type
Label
  • Short-range order around Er3+ in silica waveguides containing Aluminium, Titanium and Hafnium (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • N.D. Afify, R. Grisenti, G. Dalba, C. Armellini, M. Ferrari, S. Larcheri, F. Rocca, and A. Kuzmin (2006)
    Short-range order around Er3+ in silica waveguides containing Aluminium, Titanium and Hafnium
    in Optical materials (Amst., Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • N.D. Afify, R. Grisenti, G. Dalba, C. Armellini, M. Ferrari, S. Larcheri, F. Rocca, and A. Kuzmin (literal)
Pagina inizio
  • 864 (literal)
Pagina fine
  • 867 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 28 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • Short-range order around Er3+ in silica waveguides containing Aluminium, Titanium and Hafnium (literal)
Abstract
  • Er3+-doped silica waveguides, co-doped with aluminium, titanium, and hafnium oxides, were prepared using the sol-gel method and dip-coating processing. Here, we present a characterisation of the local environment around Er3+ ions, as determined from the Er L3-edge extended X-ray absorption fine structure (EXAFS) measurements performed at ESRF (France). The first coordination shell is composed of 5-6 oxygen atoms at distances ~2.32-2.35 A , slightly varying as a function of the modifier oxide. Er3+ nearest neighbors distance does not show a significant compositional dependence. On the contrary, outer shells analysis shows significant differences: Al2O3 doping (less than 2% mol) induces an ordering around Er and increases the distance of the second shell, probably due to the substitution of Si by Al atoms; for TiO2 doping (7-15% mol), it is most probable that the second shell is composed from Si atoms as the case of pure SiO2; for HfO2 doping (from 10 to 50 mol%) there is a very clear evidence of Er-Hf coordination already at the lowest Hf content, but still in amorphous environment. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it