Josephson junction based thermometer and its application in bolometry
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© 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics, Volume 116, Issue 9 and may be found at http://scitation.aip.org/content/aip/journal/jap/116/9/10.1063/1.4894516
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School of Science |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Authors
Date
2014
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Mcode
Degree programme
Language
en
Pages
094302/1-5
Series
Journal of Applied Physics, Volume 116, Issue 9
Abstract
We propose a new type of a transition edge sensor based on an Al/AlOx/Ti/AlOx/Al superconductor—insulator—superconductor—insulator—superconductor (SIS'IS) structure. It exhibits sharp dependence of zero bias resistance on temperature of the titanium absorber in the vicinity of its superconducting critical temperature. We demonstrate temperature sensitivity of the device to be 2 μK/√Hz. Noise Equivalent Power (NEP) of the device, limited by the amplifier noise, is estimated to be 4×10−17 W/√Hz at 313 mK. The tunnel junctions between superconducting leads should help to overcome the size limitation imposed by proximity effect in conventional transition edge sensors, without sacrificing the sensitivity. Besides that the input resistance of the device can be tuned in a wide range.Description
Keywords
thermometers, Josephson junctions, aluminium, titanium, superconductors, superconducting detectors, electrical resistivity
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Citation
Faivre, T. & Golubev, D. & Pekola, Jukka. 2014. Josephson junction based thermometer and its application in bolometry. Journal of Applied Physics. Volume 116, Issue 9. 094302/1-5. ISSN 0021-8979 (printed). DOI: 10.1063/1.4894516.