1. School of Applied Physics and Materials Wuyi University Jiangmen P.R. China
2. The China‐Germany Research Center for Photonic Materials and Device The State Key Laboratory of Luminescent Materials and Devices The School of Materials Science and Engineering South China University of Technology Guangzhou China
3. Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques The School of Materials Science and Engineering South China University of Technology Guangzhou China
4. The College of Materials and Energy South China Agricultural University Guangzhou China