Millimeter-wavelength radiation from arrays of discrete high-temperature superconductor Josephson junctions

Josephson junction arrays could be competitive candidates for radiation sources in the frequency range from 0.5 to 1.5 THz. This is the range where compact solid-state continuous wave sources are most lacking. We investigated the millimeter-wave radiation from arrays of high-temperature superconduct...

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Bibliographic Details
Published inSuperconductor science & technology Vol. 23; no. 3; p. 034026
Main Authors Song, F, Levitchev, M Y, Markelov, V A, Kurin, V V, Fang, L, Klushin, A M
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.03.2010
Subjects
Arrays
Bicrystals
Electric potential
High temperature superconductors
Josephson junctions
Radiation sources
Resonators
Superconductor junctions
Superconductors
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Summary:Josephson junction arrays could be competitive candidates for radiation sources in the frequency range from 0.5 to 1.5 THz. This is the range where compact solid-state continuous wave sources are most lacking. We investigated the millimeter-wave radiation from arrays of high-temperature superconductor bicrystal Josephson junctions embedded in a quasi-optical resonator. The novel approach of utilizing the intrinsic resonance modes of the substrate to improve the impedance coupling between the series array of discrete Josephson junctions and the quasi-optical resonator was investigated by experiments and electromagnetic field simulations. Radiation from the arrays containing up to 536 junctions was detected at about 80 GHz and liquid nitrogen temperature using a low-noise receiver. The detected maximum radiation power of the arrays was about 50 pW and the peak voltage agreed exactly with the Josephson current--voltage relation.
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content type line 23
ISSN:0953-2048
1361-6668
DOI:10.1088/0953-2048/23/3/034026