Novel Self-Sustained Modulation in Superconducting Stripline Resonators

Details Novel Self-Sustained Modulation in Superconducting Stripline Resonators Novel Self-Sustained Modulation in Superconducting Stripline Resonators

2006-07-11

arxiv.org/abs/cond-mat/0607259v4

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1209/0295-5075/78/57002

We study thermal instability in a driven superconducting NbN resonator integrated with a microbridge. A monochromatic input drive is injected into the resonator and the response is measured as a function of the frequency and amplitude of the drive. Inside a certain zone in the frequency-amplitude plane the system has no steady state, and consequently self-sustained modulation of the reflected power off the resonator is generated. A theoretical model, according to which the instability originates by a hot spot forming in the microbridge, exhibits a good quantitative agreement with the experimental results.

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