1. Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of EducationHunan Provincial Key Laboratory of Low‐Dimensional Structural Physics and DevicesSchool of Physics and ElectronicsHunan University Changsha 410082 China
2. State Key Laboratory of Chemo/Biosensing and ChemometricsProvincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical EngineeringHunan University Changsha 410082 China
3. Department of Electrical and Electronic EngineeringSouthern University of Science and Technology Shenzhen 518055 China