1. School of Applied Physics and Materials Wuyi University Jiangmen 529000 China
2. School of Physics and Optoelectronics Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices The State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
3. School of Materials Science and Engineering The State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology Guangzhou 510640 China
4. Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 430074 China
5. Zhejiang Institute China University of Geosciences HangZhou 311305 P. R. China
6. Shenzhen Institute China University of Geosciences Shenzhen 518057 P. R. China