Photoluminescence and optically pumped ultraviolet lasing from nanocrystalline ZnO thin films prepared by thermal oxidation of high-quality ZnS thin films

	Photoluminescence and optically pumped ultraviolet lasing from nanocrystalline ZnO thin films prepared by thermal oxidation of high-quality ZnS thin films
其他题名	论文其他题名
	Zhang X. T.; Liu Y. C.; Zhang L. G.; Zhang J. Y.; Lu Y. M.; Shen D. Z.; Xu W.; Zhong G. Z.; Fan X. W.; Kong X. G.
	2002
发表期刊	Chinese Physics Letters
ISSN	0256-307X
卷号	19 期号:1 页码:127-130
摘要	We present a simple and useful method for preparing high-quality nanocrystalline ZnO thin films, i.e. the thermal oxidation of high-quality ZnS films prepared by the low-pressure metal-organic chemical vapour deposition technique. The x-ray diffraction measurements reveal that the nanocrystalline ZnO has a hexagonal wurtzite structure. Raman spectra show that the longitudinal optical phonon with the El-mode appears at 578 cm(-1). The multiple phonon scattering process is also observed, indicating the formation of a high-quality nanocrystalline ZnO thin film. The photoluminescence spectrum has a single emission peak: at 3.264 eV from the free-exciton mission, under the condition of low excitation power at room temperature; However, when excitation intensities exceed the threshold of 150 kW/cm(2), a new and narrow peak emerges at lower energies, which are attributed to exciton-exciton collisions, and is called the P line. The intensity of this peak increases superlinearly with the pumping power over a threshold value. This supplies strong evidence of stimulated emission. The multiple longitudinal cavity modes observed in the stimulated emission spectrum indicate the successful realization of optically pumped lasing from nanocrystalline ZnO films at room temperature.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25179
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhang X. T.,Liu Y. C.,Zhang L. G.,et al. Photoluminescence and optically pumped ultraviolet lasing from nanocrystalline ZnO thin films prepared by thermal oxidation of high-quality ZnS thin films[J]. Chinese Physics Letters,2002,19(1):127-130.
APA	Zhang X. T..,Liu Y. C..,Zhang L. G..,Zhang J. Y..,Lu Y. M..,...&Kong X. G..(2002).Photoluminescence and optically pumped ultraviolet lasing from nanocrystalline ZnO thin films prepared by thermal oxidation of high-quality ZnS thin films.Chinese Physics Letters,19(1),127-130.
MLA	Zhang X. T.,et al."Photoluminescence and optically pumped ultraviolet lasing from nanocrystalline ZnO thin films prepared by thermal oxidation of high-quality ZnS thin films".Chinese Physics Letters 19.1(2002):127-130.

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