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Article Dans Une Revue Applied Physics Letters Année : 2011

Low temperature reflectivity study of ZnO/(Zn,Mg)O quantum wells grown on M-plane ZnO substrates

Résumé

We report growth of high quality ZnO/Zn0.8Mg0.2O quantum well on M-plane oriented ZnO substrates. The optical properties of these quantum wells are studied by using reflectance spectroscopy. The optical spectra reveal strong in-plane optical anisotropies, as predicted by group theory, and marked reflectance structures, as an evidence of good interface morphologies. Signatures ofc onfined excitons built from the spin-orbit split-off valence band, the analog of exciton C in bulk ZnO are detected in normal incidence reflectivity experiments using a photon polarized along the c axis of the wurtzite lattice. Experiments performed in the context of an orthogonal photon polarization, at 90° of this axis, reveal confined states analogs of A and B bulk excitons. Envelope function calculations which include excitonic interaction nicely account for the experimental report.
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Dates et versions

hal-00553820 , version 1 (09-01-2011)
hal-00553820 , version 2 (17-10-2011)

Identifiants

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Luc Beaur, Thierry Bretagnon, Christelle Brimont, Thierry Guillet, Bernard Gil, et al.. Low temperature reflectivity study of ZnO/(Zn,Mg)O quantum wells grown on M-plane ZnO substrates. Applied Physics Letters, 2011, 98, pp.101913. ⟨10.1063/1.3565969⟩. ⟨hal-00553820v2⟩
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