XXVIII International Symposium ''Nanophysics and Nanoelectronics'', Nizhny Novgorod, March 11-15, 2024 Solids
Spectral measurements of a niobium Josephson junction array by a superconducting receiver with a mixer based on high-temperature bicrystalline junction
Abstract:
Spectral measurements of a niobium Josephson junctions array were performed to estimate the Josephson radiation linewidth. The array consists of 9996 Nb/NbSi/Nb junctions connected in series, occupying an area of 5 $\times$ 7 mm$^2$ on a silicon substrate. To analyze the Josephson spectrum, a heterodyne superconducting receiver with a mixer based on a high-temperature superconducting Josephson junction was used. Significant decrease of the linewidth to 0.3–0.8 MHz was detected, when the array is connected to an autonomous power source.