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Article Dans Une Revue Physical Review Letters Année : 2003

Optical transitions in few-electron artificial atoms strongly confined in ZnO nanocrystals

Résumé

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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hal-00146610 , version 1 (15-05-2007)

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Alexander Germeau, Aarnoud L. Roest, Daniel Vanmaekelbergh, Guy Allan, Christophe Delerue, et al.. Optical transitions in few-electron artificial atoms strongly confined in ZnO nanocrystals. Physical Review Letters, 2003, 90, pp.097401/1-4. ⟨10.1103/PhysRevLett.90.097401⟩. ⟨hal-00146610⟩
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