The rf‐power dependence of the ac‐Josephson steps is measured at 720 GHz, using small area Nb tunnel junctions. This frequency is well above the gap frequency of Nb. The junction is placed in a waveguide, and connected to a superconducting stripline, which effectively tunes out the junction capacitance and facilitates the coupling of the radiation to the junction. We observe three Josephson steps, and the first step crosses the zero current axis over a considerable range of rf‐power. This indicates the possible application of THz Josephson steps in voltage standards. The data are compared to the theory and we find clear evidence for the predicted intrinsic roll‐off of the Josephson current amplitude above the gap frequency.<br/
In this chapter we will discuss the high frequency properties of Josephson junctions. In the first p...
When two superconductors are connected by a weak link, a supercurrent flows, the magnitude of which ...
The electrical and shot-noise characteristics of high-current-density niobium superconductor–insulat...
The rf‐power dependence of the ac‐Josephson steps is measured at 720 GHz, using small area Nb tunnel...
The inverse ac Josephson effect occurs when a Josephson junction driven by a microwave source of fre...
We measured the Josephson radiation emitted by an InSb semiconductor nanowire junction utilizing pho...
The frequency response of three superconductive niobium resonating circuits, formed by a Nb microstr...
We have experimentally studied a small Josephson junction array in the presence of microwave irradia...
Contains reports on seven research projects.National Science Foundation Grant DMR 96-10042U.S. Air F...
Noise studies of both the dc and ac Josephson effects have been performed on a high‐Tc ramp‐type Jos...
The spectral response of niobium point‐contact Josephson junctions with resistance values R between ...
We demonstrate the narrow switching distribution of an underdamped Josephson junction from the zero ...
The modern primary voltage standard is based on the AC Josephson effect and the ensuing Shapiro step...
To be published in Physical Review LettersInternational audienceFluctuations of the current through ...
A theory of trade-offs to explain why we age has spurred 50 years of interdisciplinary research in e...
In this chapter we will discuss the high frequency properties of Josephson junctions. In the first p...
When two superconductors are connected by a weak link, a supercurrent flows, the magnitude of which ...
The electrical and shot-noise characteristics of high-current-density niobium superconductor–insulat...
The rf‐power dependence of the ac‐Josephson steps is measured at 720 GHz, using small area Nb tunnel...
The inverse ac Josephson effect occurs when a Josephson junction driven by a microwave source of fre...
We measured the Josephson radiation emitted by an InSb semiconductor nanowire junction utilizing pho...
The frequency response of three superconductive niobium resonating circuits, formed by a Nb microstr...
We have experimentally studied a small Josephson junction array in the presence of microwave irradia...
Contains reports on seven research projects.National Science Foundation Grant DMR 96-10042U.S. Air F...
Noise studies of both the dc and ac Josephson effects have been performed on a high‐Tc ramp‐type Jos...
The spectral response of niobium point‐contact Josephson junctions with resistance values R between ...
We demonstrate the narrow switching distribution of an underdamped Josephson junction from the zero ...
The modern primary voltage standard is based on the AC Josephson effect and the ensuing Shapiro step...
To be published in Physical Review LettersInternational audienceFluctuations of the current through ...
A theory of trade-offs to explain why we age has spurred 50 years of interdisciplinary research in e...
In this chapter we will discuss the high frequency properties of Josephson junctions. In the first p...
When two superconductors are connected by a weak link, a supercurrent flows, the magnitude of which ...
The electrical and shot-noise characteristics of high-current-density niobium superconductor–insulat...