1. Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, School of Microelectronics, Tianjin University, Tianjin, China
2. School of Engineering, The University of Tokyo, Tokyo, Japan
3. Department of Computer Science and Communication Engineering, Waseda University, Tokyo, Japan
4. Research Institute for Nanodevice and Bio Systems, Hiroshima University, Hiroshima, Japan