Josephson junction based thermometer and its application in bolometry

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2014
Major/Subject
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
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.