1. Department of Microelectronics, Faculty of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi, China
2. Key Laboratory of Physical Electronics and Devices, Ministry of Education, Faculty of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, China
3. SOOK High Tech (JiangSu) Company Ltd., Yangzhou, Jiangsu, China