Title :
Flux-flow-type Josephson oscillator consisting of epitaxial NbCN/MgO/NbCN junction
Author :
Kiryu, S. ; Kohjiro, S. ; Shoji, A. ; Kodaira, S. ; Inatani, J. ; Sato, S.
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
Flux-flow-type Josephson oscillators consisting of epitaxial NbCN/MgO/NbCN junctions were fabricated and their current-voltage (I-V) characteristics were measured in various magnetic fields to evaluate their oscillation characteristics. On the I-V curve for a fabricated oscillator, clear current steps were observed up to 3 mV, indicating that oscillation occurs up to 1.4 THz. Using a theoretical model, available output power for the oscillator was calculated to be in the range from 20 mu W to 40 mu W in the frequency range from 500 GHz to 1.2 THz.<>
Keywords :
Josephson effect; microwave integrated circuits; microwave oscillators; superconducting integrated circuits; superconducting junction devices; superconducting microwave devices; 20 to 40 muW; 500 GHz to 1.4 THz; I-V characteristics; Josephson oscillator; MgO substrate; THF; epitaxial NbCN-MgO-NbCN junction; flux flow type; magnetic fields; submillimetre wave type; theoretical model; Current measurement; Frequency; Laboratories; Magnetic field measurement; Magnetic fields; Niobium; Oscillators; Power generation; Substrates; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
