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Radiation emission from triangular arrays of Josephson junctions

Caputo, P.; Ustinov, A. U.; Lin, N. C. H.; Yukon, S. P.


The high frequency properties of underdamped Josephson junction arrays consisting of parallel biased triangular cells having a Josephson contact in each branch are studied. At the applied magnetic field corresponding to half a flux quantum in every cell, the junctions transverse to the bias current ("horizontal" junctions) oscillate in phase. The radiation emitted by these junctions is measured using a double-side band superheterodyne receiver in the 80-120 GHz range. It is found that the radiation has a spectral linewidth of about 80 MHz, which is close to that expected from the RSCJ model for the DC biased "vertical" junctions. Our experimental data confirm that both the frequency and the linewidth of the horizontal junction oscillations are controlled by the rotating vertical junctions. In the double row array, when the two rows are simultaneously driven at the same voltage state, we observe a weak radiation peak, which can be explained in terms of a "mixed-mode" dynamics. Numerical simulations that predict this mechanism are in good accord with experiment.

DOI: 10.1109/77.784035
Zitationen: 4
Web of Science
Zitationen: 5
Zitationen: 5
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 1999
Sprache Englisch
Identifikator ISSN: 1051-8223, 1558-2515
KITopen-ID: 1000074495
Erschienen in IEEE transactions on applied superconductivity
Verlag Institute of Electrical and Electronics Engineers (IEEE)
Band 9
Heft 2
Seiten 4538-4541
Nachgewiesen in Dimensions
Web of Science
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