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.
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页数：4
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