Light absorption enhancement in closely packed Ge quantum dots (Articolo in rivista)

Type
Label
  • Light absorption enhancement in closely packed Ge quantum dots (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.4805356 (literal)
Alternative label
  • Mirabella, S , Cosentino, S, Failla, M, Miritello, M, Nicotra, G, Simone, F, Spinella, C, Franzò, G, Terrasi, A (2013)
    Light absorption enhancement in closely packed Ge quantum dots
    in Applied physics letters; American Institute of Physics, Melville [NY] (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mirabella, S , Cosentino, S, Failla, M, Miritello, M, Nicotra, G, Simone, F, Spinella, C, Franzò, G, Terrasi, A (literal)
Pagina inizio
  • 193015 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 102 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 19 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • MATIS IMM-CNR, Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia 64, 95123 Catania, Italy IMM-CNR, VIII strada 5, 95121 Catania, Italy (literal)
Titolo
  • Light absorption enhancement in closely packed Ge quantum dots (literal)
Abstract
  • Multilayers of Ge quantum dots (QDs, 3 nm in diameter) embedded in SiO 2, separated by SiO2 barrier layer (3, 9, or 20 nm thick), have been synthesized by sputter deposition and characterized by transmission electron microscopy and light absorption spectroscopy. Quantum confinement affects the optical bandgap energy (1.9 eV for QDs, 0.8 eV for bulk Ge); moreover, the absorption probability greatly depends on the QD-QD distance. A strong electronic coupling among Ge QDs is evidenced, with a significant increase of the light absorption efficiency when the QD-QD distance is reduced. These data unveil promising aspects for light harvesting with nanostructures. (literal)
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