中国科学院机构知识库网格系统: Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation (EI CONFERENCE)

中国科学院机构知识库网格

Chinese Academy of Sciences Institutional Repositories Grid

Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation (EI CONFERENCE)

文献类型：会议论文


作者	Lu Y. M. ; Liang H. W. ; Shen D. Z. ; Zhang Z. Z. ; Zhang J. Y. ; Zhao D. X. ; Liu Y. C. ; Fan X. W.
出版日期	2006
关键词	In this paper highly oriented and vertically arranged ZnO nanotubes are prepared on Al2O3 (0 0 0 1) 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/cm2) PL spectrum shows that one strong free exciton emission (FE) locates at 3.306 eV. As the excitation density increases up to 200 kW/cm2 a new emission peak (Pn) located at low-energy side of FE is attributed to the spontaneous emission due to an exciton-exciton (Ex-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.... Under excitation density of 300 kW/cm 2 the stimulated emission originating from Ex-E x scattering is obtained. When the excitation density is above 580 kW/cm2 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. 2006 Elsevier B.V. All rights reserved.
页码	228-232
收录类别	EI
源URL	[http://ir.ciomp.ac.cn/handle/181722/33157]
专题	长春光学精密机械与物理研究所_中科院长春光机所知识产出_会议论文
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 (EI CONFERENCE)[C]. 见:.

入库方式： OAI收割

来源：长春光学精密机械与物理研究所

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