Intersubband optical absorption in quantum dots-in-a-well heterostructures

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	Intersubband optical absorption in quantum dots-in-a-well heterostructures
	Han, XX ; Li, JM ; Wu, JJ ; Cong, GW ; Liu, XL ; Zhu, QS ; Wang, ZG
刊名	journal of applied physics
	2005
卷号	98 期号:5 页码:art.no.053703
关键词	INFRARED PHOTODETECTORS
ISSN号	0021-8979
通讯作者	han, xx, chinese acad sci, inst semicond, key lab semicond mat sci, pob 912, beijing 100083, peoples r china. 电子邮箱地址: xxhan@semi.ac.cn
中文摘要	the theoretical analysis of intersubband optical transitions for inas/ ingaas quantum dots-in-a-well ( dwell ) detectors are performed in the framework of effective-mass envelope- function theory. in contrast to inas/ gaas quantum dot (qd) structures, the calculated band structure of dwell quantitatively confirms that an additional ingaas quantum well effectively lowers the ground state of inas qds relative to the conduction-band edge of gaas and enhances the confinement of electrons. by changing the doping level, the dominant optical transition can occur either between the bound states in the dots or from the ground state in the dots to bound states in the well, which corresponds to the far-infrared and long-wave infrared (lwir ) peaks in the absorption spectra, respectively. our calculated results also show that it is convenient to tailor the operating wavelength in the lwir atmospheric window ( 8 - 12 mu m ) by adjusting the thickness of the ingaas layer while keeping the size of the quantum dots fixed. theoretical predictions agree well with the available experimental data. (c) 2005 american institute of physics.
学科主题	半导体材料
收录类别	SCI
语种	英语
公开日期	2010-03-17
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/8512]
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	Han, XX,Li, JM,Wu, JJ,et al. Intersubband optical absorption in quantum dots-in-a-well heterostructures[J]. journal of applied physics,2005,98(5):art.no.053703.
APA	Han, XX.,Li, JM.,Wu, JJ.,Cong, GW.,Liu, XL.,...&Wang, ZG.(2005).Intersubband optical absorption in quantum dots-in-a-well heterostructures.journal of applied physics,98(5),art.no.053703.
MLA	Han, XX,et al."Intersubband optical absorption in quantum dots-in-a-well heterostructures".journal of applied physics 98.5(2005):art.no.053703.