Theory and experiment on electromagnetic-wave-propagation velocities in stacked superconducting tunnel structures

S. Sakai, A. V. Ustinov, H. Kohlstedt, Antonio Petraglia, Niels Falsig Pedersen

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Characteristic velocities of the electromagnetic waves propagating in vertically stacked Josephson transmission are theoretically discussed. An equation for solving n velocities of the waves in an n Josephson-junction stack is derived. The solutions of two- and threefold stacks are especially focused on. Furthermore, under the assumption that all parameters of the layers are equal, analytic solutions for a generic N-fold stack are presented. The velocities of the waves in two- and three-junction stacks by Nb-Al-AlOx-Nb systems are experimentally obtained by measuring the cavity resonance (Fiske step) modes. Comparison of the theory with the experimental data reveals good quantitative agreement.
Original languageEnglish
JournalPhysical Review B
Issue number17
Pages (from-to)12905-12914
Publication statusPublished - 1994

Bibliographical note

Copyright (1994) by the American Physical Society.



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