All-NbN Edge Junction Nanobridges as Josephson Mixers

Tsuyoshi YAKIHARA  Katsuyoshi HAMASAKI  Tsutomu YAMASHITA  Toshiaki MATSUI  Risao HAYASHI  

IEICE TRANSACTIONS (1976-1990)   Vol.E69   No.4   pp.427-429
Publication Date: 1986/04/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: Special Section LETTER (Special Issue: Papers from 1986 National Convention IECE Japan)
Category: Superconductivity Electronics

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All-NbN edge junction nanobridges have been reproducibly fabricated. They had nearly ideal characteristics: sharply defined critical current, high resistance100Ω, sharp gap structure at about 4 mV, large IoRn products, and low excess current. The sharp LC resonance step at about 1.5 mV was observed in the nanobridge SQUID's. The noise equivalent power was NEP10-19 W/Hz in Josephson mixing at 101 GHz.