1. School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
2. Southwest Institute of Technical Physics, Chengdu 610041, Sichuan, China
3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
4. Key Laboratory of Science and Technology on Infrared Detector, Luoyang 471099, China