Open AccessРазработка джозефсоновского параметрического усилителя бегущей волны нa основе алюминиевых СИС-переходов
Author(s) -
М. Тарасов,
А. Гунбина,
С. Лемзяков,
Д. Нагирная,
М. Фоминский,
А. Чекушкин,
В. Кошелец,
Э. Голдобин,
А. Калабухов
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.09.51242.11h
Subject(s) - coplanar waveguide , materials science , amplifier , optoelectronics , optics , resonator , circulator , cavity magnetron , fabrication , electrical engineering , physics , thin film , sputtering , microwave , engineering , telecommunications , cmos , nanotechnology , medicine , alternative medicine , pathology
We designed, fabricated, and tested several prototypes of a Josephson Travelling Wave Parametric Amplifier (JTWPA) with aluminum SIS junctions integrated in series array of dc SQUIDs in the central line of coplanar waveguide. Three types of fabrication recipes were tested: two with shadow evaporation and one with magnetron sputtering and direct e-beam lithography. IV curves of SQUIDs were measured at bath temperature of 0.3 K. We developed a cryogenic setup for meas-urements of spectral characteristics of JTWPA comprising cold HEMT amplifier with circulator, cold attenuators and filters in signal and pump coaxial lines. Resonant characteristic of coplanar quarter-wave resonator with directional coupler intended for short JTWPA was measured.