T. Guillet, T. Bretagnon, T. Taliercio, P. Lefebvre, B. Gil, C. Morhain, Xiaodong Tang
Abstract:International audienceWe report on the optical spectroscopy of a series of ZnO/(Zn, Mg)O quantum wells of different widths, using time-resolved photoluminescence. The samples were grown by molecular beam epitaxy on ZnO templates, themselves deposited on sapphire substrates. The barriers consist of Zn0.78Mg0.22O layers. The presence of large internal electric fields in these quantum wells results in a competition between quantum confinement and the quantum confined Stark effect as the quantum well width is vari…
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