Josephson plasma emission from tunnel-injected nonequilibrium high-Tc superconductors

Ienari Iguchi; Wan Wang; Kiejin Lee; Eiji Kume; Hiroki Takahashi

doi:10.1117/12.397844

6 September 2000 Josephson plasma emission from tunnel-injected nonequilibrium high-T_c superconductors

Ienari Iguchi, Wan Wang, Kiejin Lee, Eiji Kume, Hiroki Takahashi

Proceedings Volume 4058, Superconducting and Related Oxides: Physics and Nanoengineering IV; (2000) https://doi.org/10.1117/12.397844
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

We report on the novel nonequilibrium microwave emissions from quasiparticle-injected high-Tc superconductors. The phenomena have been observable for the current-injected YBa₂Cu₃O_{7- y}(YBCO)/I/Au or Bi₂Sr₂CaCu₂O_y(BSCCO)/I/Au thin- film tunnel junctions and BSCCO single-crystal mesa samples. For the thin-film tunnel junctions, the emitted radiation appears as broadband. The different emission characteristics between the YBCO and BSCCO tunnel junctions strongly suggest the possibility of Josephson plasma emission. On the other hand, for the mesa samples, the radiation appears as three different modes depending on the bias point in the hysteretic current-voltage characteristics: Josephson self-emission, nonequilibrium broad emission and sharp emission. The latter two emission are identified as Josephson plasma emission.

Citation Download Citation

Ienari Iguchi, Wan Wang, Kiejin Lee, Eiji Kume, and Hiroki Takahashi "Josephson plasma emission from tunnel-injected nonequilibrium high-T_c superconductors", Proc. SPIE 4058, Superconducting and Related Oxides: Physics and Nanoengineering IV, (6 September 2000); https://doi.org/10.1117/12.397844

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