Optical properties of InAs quantum dots in a Si matrix

被引:65
作者
Heitz, R [1 ]
Ledentsov, NN
Bimberg, D
Egorov, AY
Maximov, MV
Ustinov, VM
Zhukov, AE
Alferov, ZI
Cirlin, GE
Soshnikov, IP
Zakharov, ND
Werner, P
Gösele, U
机构
[1] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany
[2] RAS, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia
[3] Russian Acad Sci, Inst Analyt Instrumentat, St Petersburg 198103, Russia
[4] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany
关键词
D O I
10.1063/1.123660
中图分类号
O59 [应用物理学];
学科分类号
摘要
We investigate the optical properties of nanoscale InAs quantum dots (QDs) in a Si matrix. At a growth temperature of 400 degrees C, the deposition of 7 ML InAs leads to the formation of coherent islands with dimensions in the 2-4 nm range. A luminescence band in the 1.3 mu m region found exclusively for samples with such InAs QDs exhibits a pronounced excitation density dependence of the peak position and a decay time of 440 ns. The optical properties suggest an indirect type II transition for InAs/Si QDs. The electronic structure of InAs/Si QDs is discussed in view of available band offset information. (C) 1999 American Institute of Physics. [S0003-6951(99)00512-4].
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页码:1701 / 1703
页数:3
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