1. Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, China
2. College of Science, National University of Defense Technology, Changsha 410073, China
3. Center for Advanced Material Diagnostic Technology, Shenzhen Technology University, Shenzhen 518118, China
4. Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
5. HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
6. Institute of Applied Physics and Computational Mathematics, Beijing 100084, China