1. Institute of Crystalline Materials, Shanxi University, Taiyuan, Shanxi 030006, PR China
2. Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan, Shanxi 030006, PR China
3. Key Laboratory of Energy Storage Materials Innovation and Integration of Shanxi Province, Taiyuan, Shanxi 030006, PR China