Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation

	Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation
其他题名	论文其他题名
	Lu Y. M.; Liang H. W.; Shen D. Z.; Zhang Z. Z.; Zhang J. Y.; Zhao D. X.; Liu Y. C.; Fan X. W.
	2006
发表期刊	Journal of Luminescence
ISSN	0022-2313
卷号	119 页码:228-232
摘要	In this paper, highly oriented and vertically arranged ZnO nanotubes are prepared on Al2O3 (0001) substrate without employing any metal catalysts by plasma-assisted molecular beam epitaxy. The photoluminescence (PL) spectra at room temperature are studied under high excitation densities. Under lower excitation density (< 60 kW/cm(2)), PL spectrum shows that one strong free exciton emission (FE) locates at 3.306 eV. As the excitation density increases up to 200 kW/cm(2), a new emission peak (P-n) located at low-energy side of FE is attributed to the spontaneous emission due to an exciton-exciton (E-x- E-x) scattering process from two ground state excitons, where one exciton is recombined by emitting a photon and the other is scattered into the excited states of n = 2, 3, 4...infinity. Under excitation density of 300 kW/cm(2), the stimulated emission originating from E-x-E-x scattering is obtained. When the excitation density is above 580 kW/cm(2), the emission from electron-hole plasma is observed in low-energy side of the P band and indicates a typical superradiation recombination processes with increasing excitation density. (c) 2006 Elsevier B.V. All rights reserved.
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/181722/24950
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Lu Y. M.,Liang H. W.,Shen D. Z.,et al. Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation[J]. Journal of Luminescence,2006,119:228-232.
APA	Lu Y. M..,Liang H. W..,Shen D. Z..,Zhang Z. Z..,Zhang J. Y..,...&Fan X. W..(2006).Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation.Journal of Luminescence,119,228-232.
MLA	Lu Y. M.,et al."Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation".Journal of Luminescence 119(2006):228-232.

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