1. Department of Electronic Engineering, School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen, China
2. Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
3. Department of Microelectronics and Integrated Circuit, School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen, China