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Exciton-phonon interaction in Al0.4Ga0.6N/Al0.53Ga0.47N multiple quantum wells |
| Ya-Li Liu(刘雅丽)1, Peng Jin(金鹏)1, Gui-Peng Liu(刘贵鹏)1, Wei-Ying Wang(王维颖)2, Zhi-Qiang Qi(齐志强)3, Chang-Qing Chen(陈长清)3, Zhan-Guo Wang(王占国)1 |
1 Key Laboratory of Semiconductor Materials Science and Beijing Key Laboratory of Low-dimensional Semiconductor Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
2 State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
3 Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract The exciton-phonon interaction in Al0.4Ga0.6N/Al0.53Ga0.47N multiple quantum wells (MQWs) is studied by deep-ultraviolet time-integrated and time-resolved photoluminescence (PL). Up to four longitudinal-optical (LO) phonon replicas of exciton recombination are observed, indicating the strong coupling of excitons with LO phonons in the MQWs. Moreover, the exciton-phonon coupling strength in the MQWs is quantified by the Huang-Rhys factor, and it keeps almost constant in a temperature range from 10 K to 120 K. This result can be explained in terms of effects of fluctuations in the well thickness in the MQWs and the temperature on the exciton-phonon interaction.
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Received: 08 March 2016
Revised: 10 April 2016
Accepted manuscript online:
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PACS:
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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78.66.Fd
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(III-V semiconductors)
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73.40.Kp
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(III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB619306), the Beijing Science and Technology Project, China (Grant No. Z151100003315024), and the National Natural Science Foundation of China (Grant No. 61404132). |
Corresponding Authors:
Peng Jin
E-mail: pengjin@semi.ac.cn
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Cite this article:
Ya-Li Liu(刘雅丽), Peng Jin(金鹏), Gui-Peng Liu(刘贵鹏), Wei-Ying Wang(王维颖), Zhi-Qiang Qi(齐志强), Chang-Qing Chen(陈长清), Zhan-Guo Wang(王占国) Exciton-phonon interaction in Al0.4Ga0.6N/Al0.53Ga0.47N multiple quantum wells 2016 Chin. Phys. B 25 087801
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