| Autor: |
Harnack, Oliver, Darula, Marian, Beuven, Stephan, Amatuni, Levon, Kohlstedt, Hermann |
| Zdroj: |
Journal of Low Temperature Physics; February 1997, Vol. 106 Issue: 3-4 p463-468, 6p |
| Abstrakt: |
We report on the high frequency properties of high-Tcsuperconductor (HTS) Josephson junctions using mixing experiments in the frequency range 78 GHz-119 GHz. Experiments with YBa2Cu3O7(YBCO) step-edge (SEJ) and bicrystal junctions on LaAlO3and MgO substrates have been performed. In order to achieve optimal junction properties we performed an oxygen plasma treatment. Junctions with RSJ-like current voltage characteristics were mounted into a heterodyne mixing setup. We obtained conversion efficiencies around-40 dB and heterodyne mixing response above 1 THz. For SEJs we observed mixing response related to a second junction in series. We also investigated self-mixing properties. |
| Databáze: |
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