Key Lab of Microelectronic Devices&Integrated Technology Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 China;
University of Chinese Academy of Sciences Beijing 100049 China;
School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences Beijing 100049 China;
Department of Electrical Engineering Pennsylvania State University University Park PA 16802 United States;
Department of Biomedical Engineering Pennsylvania State University University Park PA 16802 United States;