Spatial fluctuations of optical emission from single ZnO/MgZnO nanowire quantum wells

被引：32

作者：

Czekalla, C. ^{[1
]}

Guinard, J. ^{[2
,3
]}

Hanisch, C. ^{[1
]}

Cao, B. Q. ^{[1
]}

Kaidashev, E. M. ^{[1
]}

Boukos, N. ^{[4
]}

Travlos, A. ^{[4
]}

Renard, J. ^{[5
]}

Gayral, B. ^{[5
]}

Dang, D. Le Si ^{[2
,3
]}

Lorenz, M. ^{[1
]}

Grundmann, M. ^{[1
]}

机构：

[1] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany

[2] CNRS, Inst Neel, CEA, Grp Nanophys & Semicond, F-38042 Grenoble, France

[3] Univ Grenoble 1, F-38042 Grenoble, France

[4] Natl Ctr Sci Res Demokritos, Inst Mat Sci, GR-15310 Athens, Greece

[5] CEA, DRFMC, SP2M, PSC,CNRS,Grp Nanophys & Semicond, F-38054 Grenoble, France

来源：

NANOTECHNOLOGY | 2008年 / 19卷 / 11期

关键词：

Cathodoluminescence - Light emission - Nanowires - Photoluminescence - Pulsed laser deposition;

D O I：

10.1088/0957-4484/19/11/115202

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

MgZnO/ZnO quantum wells on top of ZnO nanowires were grown by pulsed laser deposition. Ensembles of spatially fluctuating and narrow cathodoluminescence peaks with single widths down to 1 meV were found at the spectral position of the quantum well emission at 4 K. In addition, the number of these narrow QW peaks increases with increasing excitation power in micro-photoluminescence, thus pointing to quantum-dot-like emission centers. Indeed, laterally strained areas of about 5 nm diameter were identified at the quantum well positions on top of the nanowires by high-resolution transmission electron microscopy.

引用

页数：6

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