EXCITON TUNNELING REVEALED BY MAGNETICALLY TUNED INTERWELL COUPLING IN SEMICONDUCTOR DOUBLE-QUANTUM WELLS

被引：61
|
作者：
LAWRENCE, I
HAACKE, S
MARIETTE, H
RUHLE, WW
ULMERTUFFIGO, H
CIBERT, J
FEUILLET, G
机构：
[1] UNIV GRENOBLE 1,SPECTROMETRIE PHYS LAB,F-38054 GRENOBLE 9,FRANCE
[2] MAX PLANCK INST FESTKORPERFORSCH,D-70569 STUTTGART,GERMANY
[3] CNRS,MAX PLANCK INST FESTKORPERFORSCH,GRENOBLE HIGH MAGNET FIELD LAB,F-38042 GRENOBLE,FRANCE
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.73.2131
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have found strong evidence for tunneling of excitons as an entity in CdTe/CdMnTe and CdTe/CdZnTe asymmetric double quantum wells (QWs). An external magnetic field changes the coupling between the two QWs by allowing resonances to occur between excitonic states. The tunneling dynamics are investigated by time-resolved and steady-state photoluminescence spectroscopies under magnetic field. Very efficient tunneling is found when the transfer of a spatially direct exciton is possible, either with the emission of LO phonons or via the resonance with the 2s state of the low energy QW.
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页码：2131 / 2134
页数：4
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