1. Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai 200234, China
2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
3. School of Materials Science and Engineering, Nanchang University, and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang 330031, China
4. Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
5. Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China