An easily-prepared impedance matched Josephson parametric amplifier

作     者：卢亚鹏 左权 潘佳政 江俊良 魏兴雨 李子硕 许问渠 张凯旋 郭婷婷 王硕 曹春海 许伟伟 孙国柱 吴培亨 Ya-Peng Lu;Quan Zuo;Jia-Zheng Pan;Jun-Liang Jiang;Xing-Yu Wei;Zi-Shuo Li;Wen-Qu Xu;Kai-Xuan Zhang;Ting-Ting Guo;Shuo Wang;Chun-Hai Cao;Wei-Wei Xu;Guo-Zhu Sun;Pei-Heng Wu

作者机构：Research Institute of Superconductor ElectronicsSchool of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Purple Mountain LaboratoriesNanjing 211111China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第6期

页      面：48-51页

核心收录：

学科分类：080902[工学-电路与系统] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 

基　　金：Project partially supported by the National Key R&D Program of of China(Grant No.2016YFA0301801) the National Natural Science Foundation of China(Grant Nos.61521001 and 61571219) PAPD,Dengfeng Project B of Nanjing University 

主　　题：Josephson junction parametric amplification impedance matching gain and bandwidth 

摘      要：An impedance matched parametric amplifier(IMPA)with Josephson junctions is fabricated and characterized.A hybrid structure containing coplanar and strip structures is implemented to realize an impedance taper line and a plate capacitor in an LC nonlinear resonator based on Josephson *** upper plate of the capacitor is isolated with SiNx without grounding as well as the *** easily-prepared designs greatly reduce the requirements for lithography alignment and precision,which makes the fabrication process more *** experimental results show that in such IMPA a gain higher than 25 dB with a bandwidth of about 100 MHz can be *** broadband amplifier operates close to the quantum *** adjusting the working point,a higher bandwidth of about 400 MHz can be obtained with a gain of about 17 dB.