Citation:
Weitz, D. A. ; Skocpol, W. J. ; Tinkham, M. Niobium point-contact Josephson-junction behavior at 604 gHz. Applied Physics Letters 1977, 31, 227-229. Copy at http://www.tinyurl.com/n64k4mw
 | weitz1977.pdf | 271 KB |
Abstract:
We have measured the ac Josephson effect in Nb point contactsat 604 GHz (496 μm). 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⩽R⩽200 Ω) 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.