Role of local fields in the optical properties of silicon nanocrystals using the tight binding approach (Articolo in rivista)

Type
Label
  • Role of local fields in the optical properties of silicon nanocrystals using the tight binding approach (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.75.033312 (literal)
Alternative label
  • Trani, F; Ninno, D; Iadonisi, G (2007)
    Role of local fields in the optical properties of silicon nanocrystals using the tight binding approach
    in Physical review. B, Condensed matter and materials physics; American Physical Society (APS), College Pk (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Trani, F; Ninno, D; Iadonisi, G (literal)
Pagina inizio
  • 033312-1 (literal)
Pagina fine
  • 033312-4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://prb.aps.org/abstract/PRB/v75/i3/e033312 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 75 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy; CNR, INFM, Dipartimento Sci Chim, I-80126 Naples, Italy (literal)
Titolo
  • Role of local fields in the optical properties of silicon nanocrystals using the tight binding approach (literal)
Abstract
  • The role of local fields in the optical response of silicon nanocrystals is analyzed using a tight binding approach. Our calculations show that, at variance with bulk silicon, local field effects dramatically modify the silicon nanocrystal optical response. An explanation is given in terms of surface electronic polarization and confirmed by the fair agreement between the tight binding results and that of a classical dielectric model. From such a comparison, it emerges that the classical model works not only for large but also for very small nanocrystals. Moreover, the dependence on size of the optical response on the nanocrystal size is discussed, in particular treating the limit of large size nanocrystals. (literal)
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