1. School of Applied Science, Beijing Information Science and Technology University, Beijing 100192, China
2. School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China
3. State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
4. Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China
5. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China