Long-range exciton transport by dynamic strain fields in a GaAs quantum well

被引：66

作者：

Rudolph, J. ^{[1
]}

Hey, R. ^{[1
]}

Santos, P. V. ^{[1
]}

机构：

[1] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.99.047602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a novel approach for the microscopic confinement and transport of excitons in GaAs quantum wells (QWs) using the moving strain field of a surface acoustic wave (SAW). We demonstrate that the band-gap modulation induced by the SAW strain field traps long-living indirect excitons in a double QW structure within sub-mu m-wide stripes parallel to the acoustic wave fronts and transports them over several hundreds of mu m.

引用

页数：4

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