Title :
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
fDate :
3/1/1991 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
