Magnetic trap for excitons

被引：26
|
作者：
Christianen, PCM
Piazza, F
Lok, JGS
Maan, JC
van der VLeuten, W
机构：
[1] Univ Nijmegen, Inst Mat Res, High Field Magnet Lab, NL-6525 ED Nijmegen, Netherlands
[2] Eindhoven Univ Technol, COBRA, Interuniv Res Inst, NL-5600 MB Eindhoven, Netherlands
来源：
PHYSICA B-CONDENSED MATTER | 1998年 / 249卷
关键词：
magnetic trap; excitons; photoluminescence;
D O I：
10.1016/S0921-4526(98)00273-7
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
High in-plane magnetic field gradients are used to control the lateral motion of excitons in an InGaAs quantum well. The gradients, as large as 6.10(4) T/m, are produced by positioning a thin magnetized stripe of dysprosium on top of the quantum well. By measuring the exciton photoluminescence energy and intensity, spatially resolved with um resolution, it is shown that the diamagnetic excitons are forced to regions of low magnetic field, because of the interaction of their magnetic moment with the inhomogeneous field. These results show the possibility to magnetically confine excitons to a limited region of space, which opens the way for the realization of the first magnetic trap in solids. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：624 / 627
页数：4
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