1. Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering , Hebei University of Technology , 5340 Xiping Road , Beichen District, Tianjin 300401 , People’s Republic of China
2. State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering , Jilin University , 2699 Qianjin Street , Changchun 130012 , People’s Republic of China
3. State Key Lab of Precision Measurement Technology and Instruments, Department of Precision Instrument , Tsinghua University , Haidian, Beijing, 100084 , China