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. |
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