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Phys. Rev. Lett. 97, 267001 (2006) [4 pages]

Radiation from a Single Josephson Junction into Free Space due to Josephson Oscillations

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L. N. Bulaevskii1 and A. E. Koshelev2
1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
2Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

Received 20 February 2006; published 26 December 2006

We consider electromagnetic emission from a Josephson junction (JJ) in a resistive state in an external magnetic field and derive the radiation power from the dielectric layer inside a JJ directly into outside dielectric media. Matching the electric and magnetic fields at the JJ edges, we find dynamic boundary conditions for the phase difference in JJ. We find that the fraction of the power transformed into radiation is determined by the dissipation inside the JJ. It tends to unity as dissipation vanishes independently of the mismatch of the junction and dielectric media impedances.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.267001
DOI:
10.1103/PhysRevLett.97.267001
PACS:
85.25.Cp, 42.25.Gy, 74.50.+r