1State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong , China
2School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, Guangdong , China
3College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang , China