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Thermal carrier processes in bimodal-sized quantum dots with different lateral coupling strength
Zhou XL; Chen YH; Li TF; Ye XL; Xu B; Wang ZG; Zhou, XL (reprint author), Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, POB 912, Beijing 100083, Peoples R China, zhouxl06@semi.ac.cn
2011
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume99Issue:3Pages:31903
AbstractIn this paper, we have studied the thermal carrier process in bimodal-sized In(Ga)As/GaAs quantum dots (QDs) via temperature dependent photoluminescence (PL). The PL intensity ratio of low energy modal to high energy modal is observed to be temperature sensitive and show different trends for QDs with weak and strong lateral coupling strength, i.e., rise and drop with increasing temperature, respectively. The experimental results are explained by two competing processes: (i) carrier thermal escape from each modal to wetting layer state and (ii) direct carrier coupling between two modals. An improved carrier rate equation model is developed to further demonstrate the importance of process ii in strong lateral coupled QDs system. (C) 2011 American Institute of Physics. [doi:10.1063/1.3614433]
metadata_83中科院半导体材料科学重点实验室
KeywordRedistribution
Subject Area半导体材料
Funding OrganizationNational Natural Science Foundation of China[60625402, 60990313]; 973 Program
Indexed BySCI
Language英语
Date Available2012-02-06
Document Type期刊论文
Identifierhttp://ir.semi.ac.cn/handle/172111/22809
Collection中科院半导体材料科学重点实验室
Corresponding AuthorZhou, XL (reprint author), Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, POB 912, Beijing 100083, Peoples R China, zhouxl06@semi.ac.cn
Recommended Citation
GB/T 7714
Zhou XL,Chen YH,Li TF,et al. Thermal carrier processes in bimodal-sized quantum dots with different lateral coupling strength[J]. APPLIED PHYSICS LETTERS,2011,99(3):31903.
APA Zhou XL.,Chen YH.,Li TF.,Ye XL.,Xu B.,...&Zhou, XL .(2011).Thermal carrier processes in bimodal-sized quantum dots with different lateral coupling strength.APPLIED PHYSICS LETTERS,99(3),31903.
MLA Zhou XL,et al."Thermal carrier processes in bimodal-sized quantum dots with different lateral coupling strength".APPLIED PHYSICS LETTERS 99.3(2011):31903.
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