Two-photon excitation of luminescence in pyrolytic silicon nanocrystals

M. Falconieri, R. D'Amato, F. Fabbri, M. Carpanese, E. Borsella

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Abstract

Two-photon-excited luminescence after femtosecond near-infrared (NIR) excitation was observed in chemically oxidized silicon nanocrystals (Si-nc) produced by laser-assisted pyrolysis of silane. The luminescence time decay and emission spectrum resulted in good agreement with those after blue excitation. The underlying two-photon absorption coefficient was also measured by the open-aperture z-scan technique, obtaining a value of 12.5 cm/GW, which is intermediate between the values reported in the literature for bulk silicon and for very small Si-nc. © 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)951 - 954
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume41
Issue number6
DOIs
Publication statusPublished - May 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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