Share Email Print
cover

Proceedings Paper

Magneto-optical properties of diluted magnetic semiconductor nanostructures
Author(s): Yasuo Oka; Kazumasa Takabayashi; Nobuhiro Takahashi; Eiji Shirado; Jinxi Shen; Izuru Souma
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Low-dimensional diluted magnetic semiconductors have been made by epitaxy and microfabrication techniques. Multiple quantum wells of the Cd1-xMnxTe/ZnTe (x equals 0.1) system were grown by molecular beam epitaxy. Quantum wires of Cd1-xMnxSe (x equals 0.08) were fabricated from the quantum well of Cd1-xMnxSe/ZnSe by the electron beam lithography. Quantum dots of Cd1-xMnxSe (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 Cd1-xMnxTe/ZnTe multiple quantum wells shows the formation processes of magnetic polarons of excitons. The exciton luminescence from the quantum wires of Cd1-xMnxSe 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.

Paper Details

Date Published: 29 November 2000
PDF: 6 pages
Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); doi: 10.1117/12.408299
Show Author Affiliations
Yasuo Oka, Tohoku Univ. and Japan Science and Technology Corp. (Japan)
Kazumasa Takabayashi, Tohoku Univ. and Japan Science and Technology Corp. (Japan)
Nobuhiro Takahashi, Tohoku Univ. and Japan Science and Technology Corp. (Japan)
Eiji Shirado, Tohoku Univ. and Japan Science and Technology Corp. (Japan)
Jinxi Shen, Tohoku Univ. and Japan Science and Technology Corp. (Japan)
Izuru Souma, Tuhoku Univ. and Japan Science and Technology Corp. (Japan)


Published in SPIE Proceedings Vol. 4086:
Fourth International Conference on Thin Film Physics and Applications
Junhao Chu; Pulin Liu; Yong Chang, Editor(s)

© SPIE. Terms of Use
Back to Top