1. School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China
2. Research Centre for Information Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, P.R. China
3. Department of Photoelectric Engineering, Lishui University, Lishui 323000, P.R. China
4. School of Metallurgy and Environment, Central South University, Changsha 410083, P.R. China
5. Medico-Engineering Cooperation on Applied Medicine Research Center, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China