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Anisotropic linear-polarization luminescence in CdTe/CdMnTe quantum wires |
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| Authors: | Yukihiro Harada Osamu Wada Henri Mariette |
| Affiliation: | a Department of Electrical and Electronics Engineering, Graduate School of Engineering, Kobe University, Rokkodai 1-1, Nada, Kobe 657-8501, Japan b Department of Physics, Faculty of Science and Engineering, Konan University, Okamoto 8-9-1, Higashi-Nada, Kobe 658-8501, Japan c Laboratoire de Spectrométrie Physique, Université J. Fourier, Grenoble I, CNRS (UMR 5588), Boîte Postale 87, F-38402 Saint Martin d’Heres Cedex, France |
| Abstract: | We theoretically studied anisotropic linear optical polarization properties in CdTe/Cd0.75Mn0.25Te quantum wires (QWRs) by using the multi-band effective mass method. In this QWR system, the spatial distribution of the Mn composition influences both the lateral quantum confinement and the sp-d exchange coupling. The calculated expectation value of the hole spin demonstrates that the hole spin is reoriented along the external magnetic field when applying the magnetic field parallel to the QWR. The hole-spin reorientation causes anisotropic behavior in the Zeeman shift and the linearly polarized optical transitions, which sensitively depends on the Mn spatial distribution. Such characteristic features appeared in the QWR have been demonstrated experimentally and compared with the theoretical calculations. |
| Keywords: | Diluted magnetic semiconductor Quantum wire |
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