Size-dependent optical properties of Si nanocrystals embedded in a silica matrix.
J Nanosci Nanotechnol
; 12(11): 8681-5, 2012 Nov.
Article
em En
| MEDLINE
| ID: mdl-23421265
ABSTRACT
We report on a numerical investigation of the size distribution effect on the optical properties of Si nanocrystals embedded in a silica matrix. Firstly, the dielectric function of the composite film is accurately evaluated. Next, a modified version of the Maxwell-Garnett theory is introduced. This model allows the consideration of the size distribution of the Si nanocrystals. We show that a small change in the size dispersion value may induce a sensitive modification in the line shape of the dielectric function. Our results can be used to explain the divergences observed in the literature regarding the dielectric function of Si nanocrystals.
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Base de dados:
MEDLINE
Assunto principal:
Refratometria
/
Silício
/
Dióxido de Silício
/
Nanoestruturas
/
Modelos Químicos
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article