School of Micro-Nano Electronics;
Zhejiang University;
Hangzhou 310058;
China;
State Key Discipline Laboratory of Wide Bandgap Semiconductor Technology;
School of Microelectronics;
Xidian University;
Xi’an 710071;
China;
School of Engineering;
Tokyo University;
Yayoi 2-11-16;
Tokyo 113-8656;
Japan;