1. Key Laboratory of Optoelectronics Technology, Beijing University of Technology, Beijing 100124, China
2. School of Physics and Electronic Information, Weifang University, Weifang 261061, China
3. College of Physics and Information Engineering, Fuzhou University, Fuzhou 350100, China
4. Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350100, China
5. Quantum Device Physics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, 41296 Gothenburg, Sweden