Ultrasensitive proximity Josephson sensor with kinetic inductance readout
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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3
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Applied Physics Letters, Volume 92, issue 16, pp. 1-3
Abstract
We propose a mesoscopic kinetic-inductance radiation detector based on a long superconductor-normal metal-superconductor Josephson junction. The operation of this proximity Josephson sensor relies on large kinetic inductance variations under irradiation due to the exponential temperature dependence of the critical current. Coupled with a dc superconducting quantum interference device readout, the PJS is able to provide a signal to noise (S/N) ratio up to ∼103 in the terahertz regime if operated as calorimeter, while electrical noise equivalent power as low as ∼7×10−20W/Hz⎯⎯⎯⎯⎯√ at 200mK can be achieved in the bolometer operation. The high performance together with the ease of fabrication make this structure attractive as an ultrasensitive cryogenic detector of terahertz electromagnetic radiation.Description
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Giazotto, F, Heikkilä, T, Pepe, G, Helistö, P, Luukanen, A & Pekola, J 2008, 'Ultrasensitive proximity Josephson sensor with kinetic inductance readout', Applied Physics Letters, vol. 92, no. 16, 162507, pp. 1-3. https://doi.org/10.1063/1.2908922