1. Sargent Joint Research CenterWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic InformationHuazhong University of Science and Technology (HUST) 1037 Luoyu Road Wuhan 430074 Hubei China
2. Wuhan National High Magnetic Field Center and School of PhysicsHuazhong University of Science and Technology Wuhan 430074 Hubei China
3. State Key Laboratory of Material Processing and Die & Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and Technology Wuhan 430074 Hubei China