Physics of Proximity Josephson Sensor

Juha Voutilainen; Matti A. Laakso; Tero T. Heikkil\"a

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Physics of Proximity Josephson Sensor

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arxiv 0906.5470 v2 pith:3NOFOOO4 submitted 2009-06-30 cond-mat.mes-hall cond-mat.supr-con

Juha Voutilainen , Matti A. Laakso , Tero T. Heikkilä This is my paper

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keywords sensorproximityjosephsonabsorbedabsorberadditionaffectsapplicability

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We study the proximity Josephson sensor (PJS) in both bolometric and calorimetric operation and optimize it for different temperature ranges between 25 mK and a few Kelvin. We investigate how the radiation power is absorbed in the sensor and find that the irradiated sensor is typically in a weak nonequilibrium state. We show in detail how the proximity of the superconductors affects the device response: for example via changes in electron-phonon coupling and out-of-equilibrium noise. In addition, we estimate the applicability of graphene as the absorber material.

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