1. Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Optoelectronics Engineering, Hefei University of Technology, Hefei 230009, Anhui, P. R. China
2. Academy of Optoelectronic Technology, Special Display and Imaging Technology Innovation Center of Anhui Province, Hefei University of Technology, Hefei, Anhui Province, 230009, P. R. China
3. School of Microelectronics, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China