Optical transitions in artificial few-electron atoms strongly confined inside ZnO nanocrystals.
Phys Rev Lett
; 90(9): 097401, 2003 Mar 07.
Article
em En
| MEDLINE
| ID: mdl-12689253
ABSTRACT
We have studied the optical transitions in artificial atoms consisting of one to ten electrons occupying the conduction levels in ZnO nanocrystals. We analyzed near IR absorption spectra of assemblies of weakly coupled ZnO nanocrystals for a gradually increasing electron number and found four allowed dipole transitions with oscillator strengths in quantitative agreement with tight-binding theory. Furthermore, this spectroscopy provides the single-particle energy separation between the conduction levels of the ZnO quantum dots.
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01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Holanda