Up-conversion luminescence of CdTe and CdTe/CdS quantum dots excited by femtosecond laser of low intensity

	Up-conversion luminescence of CdTe and CdTe/CdS quantum dots excited by femtosecond laser of low intensity
其他题名	论文其他题名
	An L. M.; Yang Y. Q.; Song W. S.; Su W. H.; Zeng Q. H.; Chao K. F.; Kong X. G.
	2009
发表期刊	Acta Physica Sinica
ISSN	1000-3290
卷号	58 期号:11 页码:7914-7920
摘要	We studied the steady-state and time-resolved luminescence properties of CdTe and CdTe/CdS core/shell quantum dots by one-and two-photon excitation with a femtosecond laser of low intensity. The 800 nm excitation causes a blue shift of the emission peak compared with 400 nm laser excitation. Near-quadratic laser power dependence of the up-conversion intensity and biexponential decay kinetics are observed. It is found that upconversion luminescence is composed of a photoinduced trapping and a band edge excitonic state. The blue shift of the emission peak is caused by the relative change in luminescence intensity between excitonic and trapping states. Two-step two-photon absorption involving the surface as intermediate states has been proposed for the mechanism of up-conversion luminescence of CdTe/CdS quantum dots.
收录类别	SCI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25642
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	An L. M.,Yang Y. Q.,Song W. S.,et al. Up-conversion luminescence of CdTe and CdTe/CdS quantum dots excited by femtosecond laser of low intensity[J]. Acta Physica Sinica,2009,58(11):7914-7920.
APA	An L. M..,Yang Y. Q..,Song W. S..,Su W. H..,Zeng Q. H..,...&Kong X. G..(2009).Up-conversion luminescence of CdTe and CdTe/CdS quantum dots excited by femtosecond laser of low intensity.Acta Physica Sinica,58(11),7914-7920.
MLA	An L. M.,et al."Up-conversion luminescence of CdTe and CdTe/CdS quantum dots excited by femtosecond laser of low intensity".Acta Physica Sinica 58.11(2009):7914-7920.