Abstract

A continuous measurement of the far-infrared frequency response of a point contact Josephson junction is performed between 0.7 and 2 THz. The response at increasing frequencies present three characteristic regions with variations proportional to f−2, f−4, f−6. They illustrate the losses introduced successively at increasing frequencies by the resistively shunted junction model, the junction RC time constant and the attenuation of the Josephson current above the gap frequency.

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