MIXING AND DETECTION IN YBACUO STEP-EDGE JOSEPHSON-JUNCTION ARRAYS UPTO 670 GHZ

Authors
KONOPKA J WOLFF I BEUVEN S SIEGEL M
Citation
J. Konopka et al., MIXING AND DETECTION IN YBACUO STEP-EDGE JOSEPHSON-JUNCTION ARRAYS UPTO 670 GHZ, IEEE transactions on applied superconductivity, 5(2), 1995, pp. 2443-2446
Citations number
11
Categorie Soggetti
Engineering, Eletrical & Electronic","Physics, Applied
Journal title
IEEE transactions on applied superconductivity → ACNP
ISSN journal
10518223
Volume
5
Issue
2
Year of publication
1995
Part
3
Pages
2443 - 2446
Database
ISI
SICI code
1051-8223(1995)5:2<2443:MADIYS>2.0.ZU;2-F
Abstract
Submillimeter wave detectors and mixers based on YBa2Cu3O7 (YBCO) step -edge Josephson junctions incorporated into planar antennas were desig ned and tested up to 670 GHz at temperatures from 12 to 65 K. A quasi- optic coupling system with a LaAlO3 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 short er than 500 fs.