Photoluminescence studies of type-II diluted magnetic semiconductor ZnMnTe/ZnSe quantum dots

M. C. Kuo, J. S. Hsu, J. L. Shen, K. C. Chiu, W. C. Fan, Y. C. Lin, C. H. Chia, Wu-Ching Chou*, M. Yasar, R. Mallory, A. Petrou, H. Luo

*Corresponding author for this work

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Type-II diluted magnetic semiconductor ZnMnTe quantum dots (QDs) in ZnSe matrix grown by molecular beam epitaxy were investigated by conventional and magnetophotoluminescence (PL) spectroscopy. The QD emission exhibits a type-II characteristic in excitation power dependence of PL peak energy. A nonzero circular polarization of PL at the absence of magnetic field was observed. This phenomenon is attributed to the accumulation of interface charges confined in adjacent layers. The magneto-optical measurement demonstrates a magnetic-induced degree of circular polarization in the PL spectra, indicating the Mn incorporation into the QD system.

Original languageEnglish
Article number263111
JournalApplied Physics Letters
Issue number26
StatePublished - 1 Dec 2006


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