Josephson effects in an alternating current biased transition edge   sensor
  We report the experimental evidence of the ac Josephson effect in a transition edge sensor (TES) operating in a frequency domain multiplexer and biased by ac voltage at MHz frequencies. The effect is observed by measuring the non-linear impedance of the sensor. The TES is treated as a weakly linked superconducting system and within the resistively shunted junction model framework. We provide a full theoretical explanation of the results by finding the analytic solution of the non-inertial Langevian equation of the system and calculating the non-linear response of the detector to a large ac bias current in the presence of noise. 
Luciano Gottardi, Alex Kozorezov, Hiroki Akamatsu, Jan van der Kuur,   Marcel P. Bruijn, Roland H. den Hartog, Richard Hijme...
physics.ins-det cond-mat.supr-con