Effect of inter-level relaxation and cavity length on double-state lasing performance of quantum dot lasers

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	Effect of inter-level relaxation and cavity length on double-state lasing performance of quantum dot lasers
	Xu B
刊名	physica e-low-dimensional systems & nanostructures
	2007
卷号	39 期号:2 页码:203-208
关键词	rate equation model
ISSN号	issn: 1386-9477
通讯作者	chen, yh, chinese acad sci, inst semicond, key lab semicond mat sci, po box 912, beijing 100083, peoples r china. 电子邮箱地址: yhchen@red.semi.ac.cn
中文摘要	double-state lasing phenomena are easily observed in self-assembled quantum dot (qd) lasers. the effect of inter-level relaxation rate and cavity length on the double-state lasing performance of qd lasers is investigated on the basis of a rate equation model. calculated results show that, for a certain cavity length, the ground state (gs) lasing threshold current increases almost linearly with the inter-level relaxation lifetime. however, as the relaxation rate becomes slower, the ratio of excited state (es) lasing threshold current over the gs one decreases, showing an evident exponential behavior. a relatively feasible method to estimate the inter-level relaxation lifetime, which is difficult to measure directly, is provided. in addition, fast inter-level relaxation is favorable for the gs single-mode lasing, and leads to lower wetting layer (wl) carrier occupation probability and higher qd gs capture efficiency and external differential quantum efficiency. besides, the double-state lasing effect strongly depends on the cavity length. (c) 2007 elsevier b.v. all rights reserved.
学科主题	光电子学
收录类别	SCI
语种	英语
公开日期	2010-03-29
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/9280]
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	Xu B. Effect of inter-level relaxation and cavity length on double-state lasing performance of quantum dot lasers[J]. physica e-low-dimensional systems & nanostructures,2007,39(2):203-208.
APA	Xu B.(2007).Effect of inter-level relaxation and cavity length on double-state lasing performance of quantum dot lasers.physica e-low-dimensional systems & nanostructures,39(2),203-208.
MLA	Xu B."Effect of inter-level relaxation and cavity length on double-state lasing performance of quantum dot lasers".physica e-low-dimensional systems & nanostructures 39.2(2007):203-208.