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：
日本科学技术振兴机构; 日本学术振兴会;
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
收藏
页码：110 / 113
页数：4
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