Giant Raman gain in silicon nanocrystals (Articolo in rivista)

Type
Label
  • Giant Raman gain in silicon nanocrystals (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1038/ncomms2188 (literal)
Alternative label
  • Sirleto L, Ferrara AM, Nikitin T, Novikov S, Khriachtchev L (2012)
    Giant Raman gain in silicon nanocrystals
    in Nature communications
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Sirleto L, Ferrara AM, Nikitin T, Novikov S, Khriachtchev L (literal)
Pagina inizio
  • 1220 (literal)
Pagina fine
  • 1225 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.nature.com/ncomms/journal/v3/n11/full/ncomms2188.html (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 3 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Note
  • NLM (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. National Research Council-Institute for Microelectronics and Microsystems, via P. Castellino 111, I-80131 Napoli, Italy. 2. Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland. 3 Department of Micro and Nanosciences, Aalto University, P.O. Box 13500, FI-02150 Aalto, Finland. (literal)
Titolo
  • Giant Raman gain in silicon nanocrystals (literal)
Abstract
  • Nanostructured silicon has generated a lot of interest in the past decades as a key material for silicon-based photonics. The low absorption coefficient makes silicon nanocrystals attractive as an active medium in waveguide structures, and their third-order nonlinear optical properties are crucial for the development of next generation nonlinear photonic devices. Here we report the first observation of stimulated Raman scattering in silicon nanocrystals embedded in a silica matrix under non-resonant excitation at infrared wavelengths (~1.5mum). Raman gain is directly measured as a function of the silicon content. A giant Raman gain from the silicon nanocrystals is obtained that is up to four orders of magnitude greater than in crystalline silicon. These results demonstrate the first Raman amplifier based on silicon nanocrystals in a silica matrix, thus opening new perspectives for the realization of more efficient Raman lasers with ultra-small sizes, which would increase the synergy between electronic and photonic devices. (literal)
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