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	Time-resolved photoluminescence of sub-monolayer ingaas/gaas quantum-dot-quantum-well heterostructures
	Xu, ZC; Jia, GZ; Sun, L; Yao, JH; Xu, JJ
刊名	Acta physica sinica
	2005-11-01
卷号	54期号:11页码:5367-5371
关键词	Sub-monolayer Quantum-dot-quantum-well Time-resolved photoluminescence
ISSN号	1000-3290
通讯作者	Xu, zc(zcxu@nankai.edu.cn)
英文摘要	Time-resolved photoluminescence (pl) of sub-monolayer (sml) ingaas/gaas quantum-dot-quantum-well heterostructures was measured at 5 k for the first time. the radiative lifetime of sml quantum dots (qds) increases from 500 ps to 800 ps with the increase of the size of qds, which is related to the small confinement energy of the excitons inside sml qds and the exciton transfer from smaller qds to larger ones through tunneling. the rise time of quantum-dot state pl signal strongly depends on the excitation power density. at low excitation power density, the rise time is about 35 ps, the mechanism of carrier capture is dominated by the emission of longitudinal-optical phonons. at high excitation power density, the rise time decreases as the excitation density increases, and auger process plays an important role in the carrier capture. these results are very useful for understanding the working properties of sub-monolayer quantum-dot devices.
WOS关键词	LASERS ; POWER
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000233221800066
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2426392
专题	半导体研究所
通讯作者	Xu, ZC
作者单位	1.Nankai Univ, Coll Phys, Key Lab Adv Tech & Fabricat Weak Light Nonlinear, Minist Educ, Tianjin 300457, Peoples R China 2.Nankai Univ, TEDA, Appl Phys Sch, Tianjin 300457, Peoples R China 3.Tech Univ Denmark, Res COM, DK-2800 Lyngby, Denmark 4.Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Xu, ZC,Jia, GZ,Sun, L,et al. Time-resolved photoluminescence of sub-monolayer ingaas/gaas quantum-dot-quantum-well heterostructures[J]. Acta physica sinica,2005,54(11):5367-5371.
APA	Xu, ZC,Jia, GZ,Sun, L,Yao, JH,&Xu, JJ.(2005).Time-resolved photoluminescence of sub-monolayer ingaas/gaas quantum-dot-quantum-well heterostructures.Acta physica sinica,54(11),5367-5371.
MLA	Xu, ZC,et al."Time-resolved photoluminescence of sub-monolayer ingaas/gaas quantum-dot-quantum-well heterostructures".Acta physica sinica 54.11(2005):5367-5371.

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