Niobium point-contact Josephson-junction behavior at 604 GHz
Journal Article
·
· Appl. Phys. Lett.; (United States)
We have measured the ac Josephson effect in Nb point contacts at 604 GHz (496 ..mu..m). We find the coupling of the far-infrared radiation to the point contact to depend in a simple manner on the resistance of the contact. The behavior of the high-resistance point contacts (50< or =R< or =200 ..cap omega..) is very reproducible, allowing a quantitative comparison of the data to the frequency-dependent Werthamer theory. We also account for the effects of noise and heating and compare these to Tinkham's heating theory.
- Research Organization:
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138
- OSTI ID:
- 7312545
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 31:3; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC CONDUCTIVITY
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
FAR INFRARED RADIATION
FREQUENCY DEPENDENCE
HEATING
INFRARED RADIATION
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
LASER RADIATION
METALS
NIOBIUM
NOISE
PERFORMANCE
PHYSICAL PROPERTIES
RADIATIONS
REFRACTORY METALS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TRANSITION ELEMENTS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC CONDUCTIVITY
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
FAR INFRARED RADIATION
FREQUENCY DEPENDENCE
HEATING
INFRARED RADIATION
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
LASER RADIATION
METALS
NIOBIUM
NOISE
PERFORMANCE
PHYSICAL PROPERTIES
RADIATIONS
REFRACTORY METALS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TRANSITION ELEMENTS