Intermodulation Gain in Nonlinear NbN Superconducting Microwave Resonators

Details Intermodulation Gain in Nonlinear NbN Superconducting Microwave Resonators Intermodulation Gain in Nonlinear NbN Superconducting Microwave Resonators

2005-07-03

arxiv.org/abs/cond-mat/0507056v1

Applied Physics Letters 88, 022508 (2006)

Physics

Condensed Matter

Superconductivity

4 pages, 6 figures

Scientific paper

10.1063/1.2164925

We report the measurement of intermodulation gain in NbN superconducting stripline resonators. In the intermodulation measurements we inject two unequal tones into the oscillator, the pump and signal, both lying within the resonance band. At the onset of instability of the reflected pump we obtain a simultaneous gain of both the idler and the reflected signal. The measured gain in both cases can be as high as 15 dB, whereas to the best of our knowledge intermodulation gain greater than unity in superconducting resonators has not been reported before in the scientific literature.

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