Nonlinear properties of semiconductor-doped silica sol-gel films (Articolo in rivista)

Type
Label
  • Nonlinear properties of semiconductor-doped silica sol-gel films (Articolo in rivista) (literal)
Anno
  • 1995-01-01T00:00:00+01:00 (literal)
Alternative label
  • J. Fick, G. Vitrant, A. Martucci, M. Guglielmi, S. Pelli, G.C. Righini (1995)
    Nonlinear properties of semiconductor-doped silica sol-gel films
    in Molecular crystals and liquid crystals science and technology. Section B, Nonlinear optics; Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • J. Fick, G. Vitrant, A. Martucci, M. Guglielmi, S. Pelli, G.C. Righini (literal)
Pagina inizio
  • 203 (literal)
Pagina fine
  • 209 (literal)
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  • 12 (literal)
Rivista
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  • 7 (literal)
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  • 3 (literal)
Note
  • Scopu (literal)
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  • ENSERG, Grenoble Università di Padova CNR-IFAC (literal)
Titolo
  • Nonlinear properties of semiconductor-doped silica sol-gel films (literal)
Abstract
  • Thin silica-titania films containing inclusions of CdS semiconductor microcrystals have been produced by the sol-gel technique. A large blue shift (62 nm) of the absorption edge is observed and attributed to quantum confinement in the nanometer size microcrystals. High negative nonlinearity (n2 ? - 310-8 cm2/kW) has been found in these films. We report on measurements of the wavelength dependence of this nonlinearity. In particular a high negative nonlinear refractive index has been observed for pump photon energies located near the bandgap and between the bandgap and half the bandgap. The nonlinear refraction index shows a slow decrease in time attributed to oxidation of the semiconductor. (literal)
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