1. College of Materials Science and Engineering, College of Electronics and Information Engineering, Institute of Microelectronics, Shenzhen University, Shenzhen518060, People’s Republic of China
2. Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore117583Singapore
3. Dongguan Institute of Opto-Electronics, Peking University, Dongguan523808, People’s Republic of China
4. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Shanghai200050, People’s Republic of China