Chin. Phys. Lett.  1997, Vol. 14 Issue (9): 708-711    DOI:
Original Articles |
Optical Study of Bandedge Blue-Shift in AlGaN/GaN Double Quantum Wells
YANG Kai;SHEN Bo;ZHANG Rong;ZHOU Yu-gang;CHEN Zhi-zhong;CHEN Peng;ZHENG You-dou;HUANG Zhen-chun1
Department of Physics, Nanjing Universitx Nanjing 210093 1NASA Goddard Space Flight Center, Code 718, Greenbelt, MD 20771, USA
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YANG Kai, SHEN Bo, ZHANG Rong et al  1997 Chin. Phys. Lett. 14 708-711
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Abstract Optical properties of AlGaN/GaN double quantum wells grown by metalorganic chemical vapor deposition are investigated. The wide-angle and small angle x-ray diffraction spectra show high crystalline quality of the sample. Optical transmission and cathodoluminescence spectra exhibit that there is a blue shift of the energy bandedge in the AlGaN/GaN double quantum wells comparing to that of bulk GaN. The experimental data are compared to theoretical calculation based on the finite square well model and a confined particle transitions are identified. The observed energy shift which differs from calculated values of ground state electron to heavy hole transition is attributed to strain in the AlGaN/GaN system.
Keywords: 78.66.Fd      78.40.Kc     
Published: 01 September 1997
PACS:  78.66.Fd (III-V semiconductors)  
  78.40.Kc (Metals, semimetals, and alloys)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1997/V14/I9/0708
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YANG Kai
SHEN Bo
ZHANG Rong
ZHOU Yu-gang
CHEN Zhi-zhong
CHEN Peng
ZHENG You-dou
HUANG Zhen-chun
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