Heterodyne mixing with Nb tunnel junctions above the gap frequency
| Autor: | H. Schaeffer, R. A. Panhuyzen, J. J. Kuipers, T. M. Klapwijk, Cornelia E. Honingh, G. de Lange, M. W. M. de Graauw, H. van de Stadt |
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| Jazyk: | angličtina |
| Rok vydání: | 1994 |
| Předmět: |
Superconductivity
Heterodyne Waveguide (electromagnetism) Materials science Physics and Astronomy (miscellaneous) business.industry Niobium Astrophysics::Instrumentation and Methods for Astrophysics chemistry.chemical_element law.invention chemistry law GHZ Optoelectronics Double side band MIXERS business Beam splitter Mixing (physics) Noise (radio) Astrophysics::Galaxy Astrophysics |
| Zdroj: | Applied Physics Letters, 64(22), 3039-3041 |
| ISSN: | 0003-6951 |
| Popis: | The noise and gain of a heterodyne waveguide mixer employing Nb/Al2O3/Nb superconducting tunnel junctions with an on-chip integrated tuning element are measured and analyzed at 680-750 GHz and at 840 GHz. The lowest receiver noise temperatures are 400 K (double side band) at 720 GHz and 1500 K (3000 K including the beam splitter loss) at 840 GHz. We compare data of the pumped I-V curves with the quantum theory of mixing and demonstrate good agreement at frequencies well above the gap frequency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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