1. Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China
2. The State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Technology South China University of Technology Guangzhou 510640 China
3. School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China