Raman-active wurtzite CdO nanophase and phonon signatures in CdO/ZnO heterostructures fabricated by nonequilibrium laser plasma ablation and stress control

被引：39

作者：

Ashrafi, Almamun ^{[1
]}

Ostrikov, Kostya ^{[2
,3
]}

机构：

[1] Univ Vermont, Dept Phys, Burlington, VT 05405 USA

[2] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

[3] CSIRO Mat Sci & Engn, PNCA, Lindfield, NSW 2070, Australia

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 13期

关键词：

MICROCRYSTALS; SCATTERING; NANOWIRES;

D O I：

10.1063/1.3573795

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A combination of laser plasma ablation and strain control in CdO/ZnO heterostructures is used to produce and stabilize a metastable wurtzite CdO nanophase. According to the Raman selection rules, this nanophase is Raman-active whereas the thermodynamically preferred rocksalt phase is inactive. The wurtzite-specific and thickness/strain-dependent Raman fingerprints and phonon modes are identified and can be used for reliable and inexpensive nanophase detection. The wurtzite nanophase formation is also confirmed by x-ray diffractometry. The demonstrated ability of the metastable phase and phonon mode control in CdO/ZnO heterostructures is promising for the development of next-generation light emitting sources and exciton-based laser diodes. (C) 2011 American Institute of Physics. [doi:10.1063/1.3573795]

引用

页数：3

共 16 条

[1] Micro-Raman investigation of optical phonons in ZnO nanocrystals [J].