Volume 78, Number 5, June 2007
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 May 2007|
Novel self-sustained modulation in superconducting stripline resonators
Department of Electrical Engineering, Technion - Haifa 32000, Israel
Corresponding author: email@example.com
Accepted: 17 April 2007
We study thermal instability in a driven superconducting NbN stripline 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 of 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 hotspot forming in the microbridge, exhibits a good quantitative agreement with the experimental results.
PACS: 74.40.+k – Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.) / 85.25.Am – Superconducting device characterization, design, and modeling
© Europhysics Letters Association, 2007
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