1. Innovation Center for Gallium Oxide Semiconductor (IC-GAO), College of Integrated Circuit Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, People’s Republic of China
2. School of Electronic Information Engineering, Inner Mongolia University, Hohhot, Inner Mongolia 010021, People’s Republic of China
3. College of Science, MIIT Key Laboratory of Aerospace Information Materials and Physics, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211106, People’s Republic of China
4. School of Information and Communication Engineering, North University of China, Taiyuan, Shanxi 030051, People’s Republic of China