1. Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of Technology Beijing 100081 China
2. State Key Laboratory for Mesoscopic Physics & Department of PhysicsCollaborative Innovation Center of Quantum MatterBeijing Academy of Quantum Information SciencesNano‐Optoelectronics Frontier Center of Ministry of EducationPeking University Beijing 100871 China
3. Collaborative Innovation Center of Extreme OpticsShanxi University Taiyuan Shanxi 030006 China
4. State Key Laboratory of Low‐Dimensional Quantum PhysicsDepartment of PhysicsFrontier Science Center for Quantum InformationCollaborative Innovation Center of Quantum MatterTsinghua University Beijing 100084 China
5. Physics DepartmentSchool of SciencesNanchang University Nanchang 330031 China