1. Key Laboratory of Low‐Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan Province Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081 P. R. China
2. College of Physics and Electronic Engineering Hengyang Normal University Hengyang 421002 P. R. China
3. College of Chemistry and Materials Science Anhui Normal University Wuhu 241000 P. R. China