Microwave Emission from Coupled Josephson Junctions

  • T. F. Finnegan
  • S. Wahlstent


When a finite dc voltage V dc is established across a Josephson junction an oscillating supercurrent
$${{I}_{dc}}\,=\,{{I}_{1}}\,\sin ({{\varphi }_{0\,}}+\frac{2e{{V}_{dc}}}{h}t)$$
can be made to flow. Here I 1 is the maximum dc Josephson current and ϕ 0 is a constant. This ac supercurrent is most readily observed when the junction is coupled to a resonant structure. For a tunnel junction the junction itself forms a resonant cavity with a fundamental resonance frequency \({{\omega }_{R}}\,=\,\pi \bar{c}/2L\) determined by the phase velocity \(\bar{c}\) c in the barrier region and by the width of the wider film L.


Josephson Junction Tunnel Junction Local Oscillator Microwave Emission Couple Junction 
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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • T. F. Finnegan
    • 1
  • S. Wahlstent
    • 1
  1. 1.Institute for Basic StandardsNational Bureau of StandardsUSA

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