COUPLED TUNNEL JUNCTION EXPERIMENTS AT THE GAP FREQUENCY.

被引：0

作者：

Robertazzi, R.P. ^{[1
]}

Hunt, B.D. ^{[1
]}

Buhrman, R.A. ^{[1
]}

机构：

[1] Cornell Univ, Ithaca, NY, USA, Cornell Univ, Ithaca, NY, USA

来源：

IEEE Transactions on Magnetics | 1986年 / MAG-23卷 / 02期

关键词：

OSCILLATORS - SIGNAL DETECTION;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

By using a capacitively coupled set of Josephson tunnel junctions, experiments were performed to determine the feasibility of using a Josephson junction as a local oscillator at frequencies up to and in excess of the gap sum of the junction. One junction was biased to serve as a local oscillator, whose ac power output could be monitored by observing the constant voltage Josephson steps on the current-voltage characteristic of the second junction. Using this coupling scheme, large oscillator signal levels (12. 5 nW), were coupled to the detector junction. For frequencies below the gap sum frequency, the measurements are consistent with the Werthamer theory. For bias voltages above the gap sum, an anomalously fast rolloff of the detected power from the oscillator junction was observed.

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