High-density optical spin injection in self-assembled semiconductor quantum dots

被引：0

作者：

Murayama, Akihiro ^{[1
]}

Tamura, Norihiro ^{[1
]}

Yamazaki, Tatsushiro ^{[1
]}

Kiba, Takayuki ^{[1
]}

机构：

[1] Hokkaido Univ, Grad Sch Informat Sci & Technol, Kita Ku, Sapporo, Hokkaido 0600814, Japan

来源：

JOURNAL OF LUMINESCENCE | 2013年 / 133卷

基金：

日本学术振兴会; 日本科学技术振兴机构;

关键词：

Quantum dot; Exciton; Spin dynamics; Spin injection; Diluted magnetic semiconductor;

D O I：

10.1016/j.jlumin.2011.12.032

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High-density optical spin injection and the dynamics from a diluted magnetic semiconductor (DMS) of Zn0.95Mn0.05Se as a spin injector into self-assembled quantum dots of CdSe have been studied by means of time- and spin-resolved photoluminescence. Spin relaxation during the injection becomes significant with increasing the density of spin-polarized exciton in the DMS. This spin relaxation can be caused by the diffusive transfer of spin-polarized electrons through the barrier, when the energy of spin-polarized electron generated in the DMS exceeds the barrier energy due to a filling effect for localized-exciton states in the DMS. (c) 2011 Elsevier B.V. All rights reserved.

引用

页码：110 / 113

页数：4

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