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Radiation from a Single Josephson Junction into Free Space due to Josephson Oscillations L. N. Bulaevskii1
 

Summary: Radiation from a Single Josephson Junction into Free Space due to Josephson Oscillations
L. N. Bulaevskii1
and A. E. Koshelev2
1
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
2
Materials 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.
DOI: 10.1103/PhysRevLett.97.267001 PACS numbers: 85.25.Cp, 42.25.Gy, 74.50.+r
Renewed interest in electromagnetic radiation from
Josephson junctions (JJs) is motivated by two independent
recent developments. First, intrinsic JJs in layered super-
conductors have been proposed as a source of electromag-
netic radiation in the terahertz frequency range [1].

  

Source: Alexei, Koshelev - Materials Science Division, Argonne National Laboratory

 

Collections: Materials Science; Physics