Phonon-induced efficient transfer of spin-polarized excitons in diluted magnetic semiconductor double quantum wells

被引：1

作者：

Park, Jiho ^{[1
]}

Saito, Kazuya ^{[1
]}

Souma, Izuru ^{[1
]}

Oka, Yasuo ^{[1
]}

Murayama, Akihiro ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2007年 / 46卷 / 11期

关键词：

diluted magnetic semiconductor; exciton-spin transfer; spin-conserving tunneling; semiconductor double quantum well; excitonic photoluminescence; giant Zeeman effect; longitudinal optical phonon;

D O I：

10.1143/JJAP.46.7290

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate the efficient transfer of spin-polarized excitons in diluted magnetic semiconductor (DMS) double quantum wells (QWs), where the spin-polarized excitons tunnel from the bottom of a non magnetic QW into a DMS-QW across a tunneling barrier and subsequently relax to the exciton ground state in the DMS-QW with phonon emissions. The exciton-transfer time decreases significantly when the exciton energy difference between both wells is equal to the energy of one longitudinal optical (LO) phonon. This observation indicates that the exciton spin transfer can be accelerated with the conservation of the spin polarization by the energy relaxation with the LO-phonon emission immediately after the tunneling.

引用

页码：7290 / 7293

页数：4

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