Magneto-optical properties of diluted magnetic semiconductor nanostructures

Yasuo Oka; Kazumasa Takabayashi; Nobuhiro Takahashi; Eiji Shirado; Jinxi Shen; Izuru Souma

doi:10.1117/12.408299

29 November 2000 Magneto-optical properties of diluted magnetic semiconductor nanostructures

Yasuo Oka, Kazumasa Takabayashi, Nobuhiro Takahashi, Eiji Shirado, Jinxi Shen, Izuru Souma

Proceedings Volume 4086, Fourth International Conference on Thin Film Physics and Applications; (2000) https://doi.org/10.1117/12.408299
Event: 4th International Conference on Thin Film Physics and Applications, 2000, Shanghai, China

Abstract

Low-dimensional diluted magnetic semiconductors have been made by epitaxy and microfabrication techniques. Multiple quantum wells of the Cd_1-xMn_xTe/ZnTe (x equals 0.1) system were grown by molecular beam epitaxy. Quantum wires of Cd_1-xMn_xSe (x equals 0.08) were fabricated from the quantum well of Cd_1-xMn_xSe/ZnSe by the electron beam lithography. Quantum dots of Cd_1-xMn_xSe (x equals 0.03) were grown by the self-organization mode on a ZnSe layer. Magneto-optical properties of these low dimensional structures were studied by time-resolved photoluminescence. The transient photoluminescence in the Cd_1-xMn_xTe/ZnTe multiple quantum wells shows the formation processes of magnetic polarons of excitons. The exciton luminescence from the quantum wires of Cd_1-xMn_xSe displays the influence of the 1D quantum confinement effect for the exciton states with the effective g-value of 100 - 150. The exciton luminescence from the wires is linearly polarized parallel to the wire direction. The exciton luminescence in the quantum dots shows the strong confinement effect of the exciton energy corresponding to the dot size of 4 - 6 nm as well as large effective g-value of 89. The quantum dot excitons also exhibit marked increase of the luminescence lifetime with increasing the magnetic field, which is caused by suppression of the non-radiative process due to the shrinkage of the exciton wavefunction.

Citation Download Citation

Yasuo Oka, Kazumasa Takabayashi, Nobuhiro Takahashi, Eiji Shirado, Jinxi Shen, and Izuru Souma "Magneto-optical properties of diluted magnetic semiconductor nanostructures", Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); https://doi.org/10.1117/12.408299

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