1. School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
2. Key Laboratory of Intelligent Sensors and Advanced Sensing Materials of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China
3. School of Physics and Electronics, Henan University, Kaifeng 475001, P. R. China
4. College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang 421008, China
5. Department of Physics and Laboratory for Quantum Engineering and Micro-Nano Energy Technology, Xiangtan University, Xiangtan 411105, Hunan, China