Nonreciprocal microwave transmission through a long Josephson junction

Kirill G. Fedorov, Sergey V. Shitov, Hannes Rotzinger, and Alexey V. Ustinov
Phys. Rev. B 85, 184512 – Published 10 May 2012

Abstract

We have measured the bidirectional propagation of microwaves through a long Josephson junction in a flux-flow regime. We demonstrate that the transmitted microwave power depends on the direction of microwave propagation with respect to the direction of the flux flow. This nonreciprocal behavior is explained by the interaction of the microwave signal with the moving fluxon chain inside the junction. Thus a long junction may act as an on-chip isolator for external microwave signals, with its transmission properties being fully controlled by the bias current and in-plane magnetic field.

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  • Received 22 February 2012

DOI:https://doi.org/10.1103/PhysRevB.85.184512

©2012 American Physical Society

Authors & Affiliations

Kirill G. Fedorov1,2,*, Sergey V. Shitov2,3, Hannes Rotzinger1, and Alexey V. Ustinov1,2

  • 1Physikalisches Institut and Deutsche Forschungsgemeinschaft, Center for Functional Nanostructures, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany
  • 2National University of Science and Technology MISIS, Leninsky prospekt 4, Moscow 119049, Russia
  • 3Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow 125009, Russia

  • *kirill.fedorov@kit.edu

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Issue

Vol. 85, Iss. 18 — 1 May 2012

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