This article is cited in 2 papers

XXV International Symposium Nanophysics and Nanoelectronics, Nizhny Novgorod, March 9-12, 2021
Superconductivity

Development of josephson traveling-wave parametric amplifier based on aluminum SIS junctions

M. Tarasov^a, A. Gunbina^b, S. Lemzyakov^c, D. Nagirnaya^a, M. Fominskii^a, A. Chekushkin^a, V. Koshelets^a, È. Goldobin^d, A. Kalabukhov<sup>e

a</sup> Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
^b Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia
^c P. L. Kapitza Institute for Physical Problems, Russian Academy of Sciences, Moscow, Russia
^d Eberhard Karls Universität Tübingen, Germany
^e Chalmers University of Technology, Goteborg, Sweden

Abstract: Prototypes of the design of Josephson traveling-wave parametric amplifier based on aluminum superconductor–insulator–superconductor junctions in the form of direct-current SQUIDs included in central conductor of coplanar line are developed, fabricated, and investigated. Three manufacturing methods for the fabrication of such devices are tested: two of them using shadow evaporation and one using magnetron sputtering and direct electron-beam lithography. Current–voltage characteristics of the junctions are measured at 0.3 K. A cryogenic setup for the measurement of spectral characteristics of such amplifier containing cold semiconductor amplifier with circulator and cooled attenuators of the channels of input signal and pump is developed. The absorption spectrum of coplanar directional coupler with a quarter-wave resonator dedicated for measurements of short chains from one to 27 SQUIDs is measured.

Keywords: superconducting tunnel junctions, SQUIDs, Josephson travelling wave parametric amplifiers, SIS junctions, magnetron sputtering.

Received: 09.04.2021
Revised: 09.04.2021
Accepted: 19.04.2021

DOI: 10.21883/FTT.2021.09.51242.11H

 English version: Physics of the Solid State, 2021, 63:10, 1564–1568

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