Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-06-30
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
13 pages, 11 figures, submitted to Journal of Applied Physics, v2: Addition of a new section discussing the radiation coupling
Scientific paper
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.
Heikkila Tero T.
Laakso Matti A.
Voutilainen Juha
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