1 Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China; 2 Purple Mountain Laboratories, Nanjing 211111, China
Abstract 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 junctions. The upper plate of the capacitor is isolated with SiNx without grounding as well as the strips. Such easily-prepared designs greatly reduce the requirements for lithography alignment and precision, which makes the fabrication process more reliable. The experimental results show that in such IMPA a gain higher than 25 dB with a bandwidth of about 100 MHz can be obtained. This broadband amplifier operates close to the quantum limit. By adjusting the working point, a higher bandwidth of about 400 MHz can be obtained with a gain of about 17 dB.
(Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))
Fund: 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), and PAPD, Dengfeng Project B of Nanjing University.
[1] Caves C M 1982 Phys. Rev. D 26 1817 [2] Clerk A A, Devoret M H, Girvin S M, Marquardt F and Schoelkopf R J 2010 Rev. Mod. Phys. 82 1155 [3] Roy A and Devoret M 2016 C.R. Phys. 17 740 [4] Castellanos-Beltran M A, Irwin K D, and Hilton G C, and Vale L R and Lehnert K W 2008 Nat. Phys. 4 929 [5] Devoret M H and Schoelkopf R J 2013 Science 339 6124 [6] Wustmann W and Shumeiko V 2013 Phys. Rev. B 87 184501 [7] Yurke B and Buks E 2006 J. Lightwave Technol. 24 5054 [8] Yamamoto T, Inomata K, Watanabe M, Matsuba K, Miyazaki T, Oliver W D, Nakamura Y and Tsai J S 2008 Appl.Phys. Lett. 93 042510 [9] Zhou X, Schmitt V, Bertet P, Vion D, Wustmann W, Shumeiko V and Esteve D 2014 Phys. Rev. B 89 214517 [10] Castellanos-Beltran M A and Lehnert K W 2007 Appl. Phys. Lett. 91 083509 [11] Lu Y P, Pan J Z, Wei X Y, Jiang J L, Lu S, Li Z S, Tu X C, Kang L, Cao C H, Wang H B, Chen J, Xu W W, Sun G Z and Wu P H 2020 AIP Advances 10 025135 [12] Mutus J Y, White T C, Jeffrey E, Sank D, Barends R, Bochmann J, Chen Y, Chen Z, Chiaro B, Dunsworth A, Kelly J, Megrant A, Neill C, O’Malley P J J, Roushan P, Vainsencher A, Wenner J, Siddiqi I, Vijay R, Cleland A N and Martinis J M 2013 Appl. Phys. Lett. 103 122602 [13] Hatridge M, Vijay R, Slichter D,Clarke J and Siddiqi I 2011 Phys. Rev. B 83 134501 [14] Lecocq F, Ranzani L, and Peterson G, Cicak K, Simmonds R W, Teufel J D and Aumentado J 2014 Phys. Rev. Applied 7 024028 [15] Laflamme C and Clerk A A 2011 Phys. Rev. A 83 033803 [16] Narla A, Sliwa K M, Hatridge M, Shankar S, Frunzio L, Schoelkopf R J and Devoret M H 2014 Appl. Phys. Lett. 104 232605 [17] Kono S, Koshino K, Tabuchi Y, Noguchi A and Nakamura Y 2018 Nat. Phys. 14 546 [18] Lin Z R, Inomata K, Oliver W D, Koshino K, Nakamura Y, Tsai J S and Yamamoto T 2014 Appl. Phys. Lett. 103 132602 [19] Jeremy B C, Florent L, Raymond W S, José A and John D T 2016 Nat. Phys. 12 683 [20] Mutus J Y, White T C, Barends R, Chen Y, Chen Z, Chiaro B, Dunsworth A, Jeffrey E, Kelly J, Megrant A, Neill C, O’Malley P, Roushan P, Sank D, Vainsencher A, Wenner J, Sundqvist K M, Cleland A N and Martinis J M 2014 Appl. Phys. Lett. 104 263513 [21] Roy T, Kundu S, Chand M, Vadiraj A M, Ranadive A, Patankar, Meghan P, Aumentado J, Clerk A A and Vijay R 2015 Appl. Phys. Lett. 107 262601 [22] Huang K Q, Guo Q J, Song C, Zheng Y R, Deng H, Wu Y L, Jin Y R, Zhu X B and Zheng D N 2017 Chin. Phys. B 26 094203 [23] Yang R and Deng H 2020 IEEE Trans. Appl. Supercond. 30 1100306 [24] Su F F, Wang Z T, Xu H K, Zhao S K, Yan H S, Yang Z H, Tian Ye and Zhao S P 2019 Chin. Phys. B 28 110303 [25] Elo T, Abhilash T S, Perelshtein M R, Lilja I, Korostylev E V and Hakonen P J 2019 Appl. Phys. Lett. 114 152601 [26] Udson C M, Sébastien J, Philippe J, Bertrand R, Alexandre B, Fabien P, Christophe M and Carles A 2019 Phys. Rev. Applied 11 034035 [27] Bosman S J, Singh V, Bruno A and Steele G A 2015 Appl. Phys. Lett. 107 192602 [28] Dolan G J 1977 Appl. Phys. Lett. 31 337
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