1. Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education)Chongqing University Chongqing 400044 China
2. Defense Key Disciplines Lab of Novel Micro‐Nano Devices and System TechnologyChongqing University Chongqing 400044 China
3. Department of Applied PhysicsCollege of PhysicsChongqing University Chongqing 401331 China