1. Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, 601 West Huangpu Road, Guangzhou 510632, Guangdong, P. R. China
2. Analytical & Testing Center, Jinan University, Guangzhou 510632, P. R. China