Study of optical properties in GaAs1-xSbx/GaAs single quantum wells

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	Study of optical properties in GaAs1-xSbx/GaAs single quantum wells
	Luo XD ; Bian LF ; Xu ZY ; Luo HL ; Wang YQ ; Wang JN ; Ge WK
刊名	acta physica sinica
	2003
卷号	52 期号:7 页码:1761-1765
关键词	GaAsSb/GaAs selectively-excited type II transition ROOM-TEMPERATURE GAAS DOTS OPERATION
ISSN号	1000-3290
通讯作者	luo xd,chinese acad sci,inst semicond,state key lab superlattices & microstruct,beijing 100083,peoples r china.
中文摘要	gaassb/gaas single quantum wells (sqws) grown by molecular beam epitaxy are studied by selectively-excited photoluminescence (sepl) measurement. for the first time, we have simultaneously observed the pl, from both type i and type ii transitions in gaassb/gaas heterostructure in the sepl. the two transitions exhibit different pl, behaviours under different excitation energy. as expected, the peak energy of type i emission remains constant in the whole excitation energy range we used, while type u transition shows a significant blue shift with increasing excitation energy. the observed blue shift is well explained in terms of electron-hole charge separation model at the interface. time-resolved(tr) pl exhibits more type 11 characteristic of gaassb/gaas qw. moreover, the results of the excitation-power-dependent pl and trpl provide more direct information on the type-ii nature of the band alignment in gaassb/gaas quantum-well structures. by combining the experimental results with some simple calculations, we have obtained the strained and unstrained valence band offsets of q(v) = 1.145 and q(v)(0) = 0. 76 in our samples, respectively.
学科主题	半导体物理
收录类别	SCI
语种	中文
公开日期	2010-08-12
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/11522]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Luo XD,Bian LF,Xu ZY,et al. Study of optical properties in GaAs1-xSbx/GaAs single quantum wells[J]. acta physica sinica,2003,52(7):1761-1765.
APA	Luo XD.,Bian LF.,Xu ZY.,Luo HL.,Wang YQ.,...&Ge WK.(2003).Study of optical properties in GaAs1-xSbx/GaAs single quantum wells.acta physica sinica,52(7),1761-1765.
MLA	Luo XD,et al."Study of optical properties in GaAs1-xSbx/GaAs single quantum wells".acta physica sinica 52.7(2003):1761-1765.