1. School of Microelectronics Tianjin University Tianjin China
2. School of Physics and Electronic Information Hulunbuir College Hulunbuir China
3. Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology Tianjin University Tianjin China
4. Department of Electronics Carleton University Ottawa ON Canada
5. College of Physics and Electronic Information Engineer Qinghai Nationalities University Xining China