Photoluminescence (PL) properties of In0.2Ga0.8As/GaAs0.96Bi0.04/In0.2Ga0.8As quantum well (QW) grown on GaAs substrates by gas source molecular beam epitaxy were studied by varying excitation power and temperature, respectively. The type-II transition energy shifts from 1.149 eV to 1.192 eV when increasing the excitation power from 10 mW to 150 mW at 4.5 K, which was ascribed to the band-bending effect. On the other hand, the type-II PL quenches quickly along with fast redshift with the increasing temperature due to the relaxation of the band bending caused by the thermal excitation process. An 8 band k·p model was used to analyze the electronic properties and the band-bending effect in the type-II QW. The calculated subband levels and transition energy fit well with the experiment results, and two thermal activation energies of 8.7 meV and 50 meV, respectively, are deduced.
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14 September 2016
Research Article|
September 08 2016
Optical properties and band bending of InGaAs/GaAsBi/InGaAs type-II quantum well grown by gas source molecular beam epitaxy
Wenwu Pan
;
Wenwu Pan
1State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology
, CAS, 865 Changning Road, Shanghai 200050, China
2
University of Chinese Academy of Sciences
, Chinese Academy of Sciences, Beijing 100190, China
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Liyao Zhang;
Liyao Zhang
a)
1State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology
, CAS, 865 Changning Road, Shanghai 200050, China
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Liang Zhu;
Liang Zhu
3National Laboratory for Infrared Physics,
Chinese Academy of Sciences
, 500 Yutian Road, Shanghai 200083, China
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Yaoyao Li;
Yaoyao Li
1State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology
, CAS, 865 Changning Road, Shanghai 200050, China
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Xiren Chen;
Xiren Chen
3National Laboratory for Infrared Physics,
Chinese Academy of Sciences
, 500 Yutian Road, Shanghai 200083, China
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Xiaoyan Wu
;
Xiaoyan Wu
1State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology
, CAS, 865 Changning Road, Shanghai 200050, China
2
University of Chinese Academy of Sciences
, Chinese Academy of Sciences, Beijing 100190, China
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Fan Zhang;
Fan Zhang
1State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology
, CAS, 865 Changning Road, Shanghai 200050, China
4School of Physical Science and Technology,
ShanghaiTech University
, Shanghai 201210, China
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Jun Shao;
Jun Shao
3National Laboratory for Infrared Physics,
Chinese Academy of Sciences
, 500 Yutian Road, Shanghai 200083, China
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Shumin Wang
Shumin Wang
b)
1State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology
, CAS, 865 Changning Road, Shanghai 200050, China
5Department of Microtechnology and Nanoscience,
Chalmers University of Technology
, Gothenburg 41296, Sweden
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Wenwu Pan
1,2
Liyao Zhang
1,a)
Liang Zhu
3
Yaoyao Li
1
Xiren Chen
3
Xiaoyan Wu
1,2
Fan Zhang
1,4
Jun Shao
3
Shumin Wang
1,5,b)
1State Key Laboratory of Functional Materials for Informatics,
Shanghai Institute of Microsystem and Information Technology
, CAS, 865 Changning Road, Shanghai 200050, China
2
University of Chinese Academy of Sciences
, Chinese Academy of Sciences, Beijing 100190, China
3National Laboratory for Infrared Physics,
Chinese Academy of Sciences
, 500 Yutian Road, Shanghai 200083, China
4School of Physical Science and Technology,
ShanghaiTech University
, Shanghai 201210, China
5Department of Microtechnology and Nanoscience,
Chalmers University of Technology
, Gothenburg 41296, Sweden
a)
E-mail: [email protected]
b)
E-mail: [email protected]
J. Appl. Phys. 120, 105702 (2016)
Article history
Received:
June 22 2016
Accepted:
August 24 2016
Citation
Wenwu Pan, Liyao Zhang, Liang Zhu, Yaoyao Li, Xiren Chen, Xiaoyan Wu, Fan Zhang, Jun Shao, Shumin Wang; Optical properties and band bending of InGaAs/GaAsBi/InGaAs type-II quantum well grown by gas source molecular beam epitaxy. J. Appl. Phys. 14 September 2016; 120 (10): 105702. https://doi.org/10.1063/1.4962288
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