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Josephson effects in an alternating current biased transition edge sensor

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Article number162605
<mark>Journal publication date</mark>20/10/2014
<mark>Journal</mark>Applied Physics Letters
Issue number16
Volume105
Number of pages4
Publication statusPublished
Original languageEnglish

Abstract

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. (C) 2014 AIP Publishing LLC.