1. Siyuan LaboratoryGuangzhou Key Laboratory of, Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Engineering Technology Research Center of, Vacuum Coating Technologies and New Energy MaterialsGuangdong Provincial Key Laboratory of Optical Fiber Sensing and CommunicationsDepartment of PhysicsJinan University Guangzhou Guangdong 510632 P.R. China
2. Key Laboratory of Clean Chemical TechnologyCollege of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 P.R. China
3. Instrumental Analysis & Research CenterSun Yat-sen University Guangzhou Guangdong 510275 P.R. China