Title :
Mixing and detection in YBaCuO step-edge Josephson junction arrays up to 670 GHz
Author :
Konopka, J. ; Wolff, I. ; Beuven, S. ; Siegel, M.
Author_Institution :
Inst. fur Mobil-und Satellitenfunktechnik, Kamp Lintfort, Germany
fDate :
6/1/1995 12:00:00 AM
Abstract :
Submillimeter wave detectors and mixers based on YBa/sub 2/Cu/sub 3/O/sub 7/ (YBCO) step-edge Josephson junctions incorporated into planar antennas were designed and tested up to 670 GHz at temperatures from 12 to 65 K. A quasi-optic coupling system with a LaAlO/sub 3/ lens was used. In some samples the noise intrinsic in the detection process does not follow the Johnson noise law but has a minimum, which for a given sample may occur in the temperature range between 35 to 50 K. Harmonic mixing recorded at 670 GHz proves that the system equilibrium is established in a time shorter than 500 fs.<>
Keywords :
Josephson effect; barium compounds; high-temperature superconductors; submillimetre wave detectors; submillimetre wave mixers; superconducting device noise; yttrium compounds; 12 to 65 K; 670 GHz; Johnson noise; LaAlO/sub 3/; LaAlO/sub 3/ lens; YBCO step-edge Josephson junction arrays; YBa/sub 2/Cu/sub 3/O/sub 7/; harmonic mixing; noise; planar antennas; quasi-optic coupling; submillimeter wave detectors; submillimeter wave mixers; Detectors; Fabrication; Frequency; Identity-based encryption; Josephson junctions; Lenses; Substrates; Superconducting device noise; Superconducting thin films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
