1. School of Optical and Electronic InformationHuazhong University of Science and Technology (HUST) Wuhan 430074 China
2. Wuhan National Laboratory for Optoelectronics (WNLO)Huazhong University of Science and Technology (HUST) Wuhan 430074 China
3. Department of Materials Science and EngineeringCollege of MaterialsXiamen University Xiamen 361005 China