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.
@article{arxiv.0906.5470,
title = {Physics of Proximity Josephson Sensor},
author = {Juha Voutilainen and Matti A. Laakso and Tero T. Heikkilä},
journal= {arXiv preprint arXiv:0906.5470},
year = {2015}
}
Comments
13 pages, 11 figures, submitted to Journal of Applied Physics, v2: Addition of a new section discussing the radiation coupling to the device, several minor changes