Affiliation: | 1.College of Electronic Science and Engineering, Nanjing University of Posts & Telecommunications,Nanjing,P.R. China;2.National Laboratory of Solid State Microstructures, Nanjing University,Nanjing,P.R. China;3.Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province,Nanjing,P.R. China |