Resonator coupled Josephson junctions; parametric excitations and mutual locking

Author

Jensen, H. Dalsgaard ; Larsen, A. ; Mygind, J.

Author_Institution

Danish Inst. of Fundamental Metrol., Lyngby, Denmark

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

3355

Lastpage

3358

Abstract

Self-pumped parametric excitations and mutual locking in systems of Josephson tunnel junctions coupled to multimode resonators are reported. For the very large values of the coupling parameter, obtained with small Nb-Al₂O₃-Nb junctions integrated in superconducting microstrip resonators, the DC I-V characteristic shows an equidistant series of current steps generated by subharmonic pumping of the fundamental resonator mode. This is confirmed by measurement of frequency and linewidth of the emitted Josephson radiation

Keywords

Josephson effect; alumina; niobium; solid-state microwave devices; strip line components; superconducting junction devices; superconductive tunnelling; DC I-V characteristic; Josephson tunnel junctions; Nb-Al₂O₃-Nb; frequency; fundamental resonator mode; linewidth; multimode resonators; mutual locking; parametric excitations; subharmonic pumping; superconducting microstrip resonators; Coupling circuits; Critical current; Dielectrics; Josephson junctions; Microstrip resonators; Mutual coupling; Niobium; RLC circuits; Resonance; Superconducting transmission lines;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133931

Filename

133931