Type I-type II transition of self-assembled In0.55Al0.45As/Al0.5Ga0.5As quantum dots

CORC > 半导体研究所 > 中国科学院半导体研究所 > 中国科学院半导体研究所（2009年前）

	Type I-type II transition of self-assembled In0.55Al0.45As/Al0.5Ga0.5As quantum dots
	Li GH ; Chen Y ; Fung ZL ; Ding K ; Han HX ; Zhou W ; Wang ZG
刊名	physica status solidi b-basic research
	2001
卷号	223 期号:1 页码:157-162
关键词	HYDROSTATIC-PRESSURE PHOTOLUMINESCENCE GAAS LUMINESCENCE GROWTH INSB GASB
ISSN号	0370-1972
通讯作者	li gh,chinese acad sci,inst semicond,natl lab superlattices & microstruct,pob 912,beijing 100083,peoples r china.
中文摘要	the photoluminescence (pl) of in0.55al0.45as/al0.5ga0.5as self-assembled quantum dots has been measured at 15 and 80 k under hydrostatic pressure. the lateral size of the dots ranges from 7 to 62 nm. the emissions from the dots with 26, 52 and 62 nm size have a blue shift under pressure, indicating that these quantum dots have the normal type-i structure with lowest conduction band at the gamma -valley. however, the pl peak of dots with 7 nm diameter moves to lower energy with increasing pressure. it is a typical character for the x-related transition. then these small dots have a type-ii structure with the x-valley as the lowest conduction level. an envelope-function calculation confirms that the gamma -like exciton transition energy will rise above the x-like transition energy in the in0.55al0.45as/al0.5ga0.5as structure if the dot size is small enough.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-08-12
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/12294]
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	Li GH,Chen Y,Fung ZL,et al. Type I-type II transition of self-assembled In0.55Al0.45As/Al0.5Ga0.5As quantum dots[J]. physica status solidi b-basic research,2001,223(1):157-162.
APA	Li GH.,Chen Y.,Fung ZL.,Ding K.,Han HX.,...&Wang ZG.(2001).Type I-type II transition of self-assembled In0.55Al0.45As/Al0.5Ga0.5As quantum dots.physica status solidi b-basic research,223(1),157-162.
MLA	Li GH,et al."Type I-type II transition of self-assembled In0.55Al0.45As/Al0.5Ga0.5As quantum dots".physica status solidi b-basic research 223.1(2001):157-162.