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Optical properties of a (Cd,Mg)Te/CdTe/(Cd,Mn)Te quantum well is investigated systematically using photoluminescence (PL) and time-resolved photoluminescence (TRPL). The PL intensity ratio of biexciton to exciton showed a linear dependence. The biexciton TRPL showed a longer lifetime as compared with that of the exciton. These results suggested an important role of dark excitons and their spin scattering...
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