On-chip integration of HTS Josephson oscillator and mixer

Author

Beuven, S. ; Darula, M. ; Harnack, O. ; Karlovsky, K. ; Kohlstedt, H.

Author_Institution

Inst. fur Schicht- und Ionentech., Forschungszentrum Julich GmbH, Germany

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

3769

Lastpage

3772

Abstract

We report on the experimental realization of a sub-mm wavelength oscillator based on HTS Josephson junctions integrated on-chip with detector Josephson junction-mixer. Detector and oscillator are coupled via a microstripline. The oscillator is a 2-dimensional (2D) network (array) of 20 HTS step-edge junctions. The array is biased in parallel, i.e. all junctions of the network are oscillating with the same frequency. Effective pumping of the Josephson mixer was possible up to several hundred GHz. The best results, i.e. significant depression of the critical current and steep Shapiro steps up to the 4th order, were obtained between 150 GHz and 200 GHz. Power transfer was detectable up to frequencies around 1.15 THz.

Keywords

Josephson effect; high-temperature superconductors; submillimetre wave detectors; submillimetre wave mixers; submillimetre wave oscillators; superconducting arrays; superconducting junction devices; superconducting mixers; 150 GHz to 1.15 THz; HTS Josephson junction; Josephson mixer; Josephson oscillator; Shapiro steps; critical current; microstrip line coupling; on-chip integration; step-edge junction; sub-MM wave detector; two-dimensional array; Detectors; Frequency; High temperature superconductors; Intersymbol interference; Josephson junctions; Microstrip; Oscillators; Superconducting devices; Superconducting filters; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783848

Filename

783848