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Time and spectrally resolved photoluminescence has been studied in quantum dots and quantum wires of Cd1–xMnxSe. The quantum dots of Cd0.97Mn0.03Se (dot size 4 to 6 nm) show exciton luminescence at around 2.4 eV, which is caused by a strong confinement effect for the exciton energy. The observed giant Zeeman shift of the exciton luminescence (with an effective g-factor of 91) indicates the exchange interaction of the excitons with the Mn ions in the dots. The quantum wires of Cd0.92Mn0.08Se (wire width 26 to 126 nm) show exciton luminescence which shifts by 5.2 meV to the higher-energy side with decreasing wire width due to the influence of the one-dimensional quantum confinement effect. The effective g-factor of the exciton in these quantum wires is 100 to 150. The magnetic polaron formation of excitons in the quantum wires is discussed.
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Oka et al. (2000) studied this question.
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