Josephson junction based thermometer and its application in bolometry

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Karlsruhe Institute of Technology

Kuvaus

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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli094302
Sivut1-5
Sivumäärä5
JulkaisuJournal of Applied Physics
Vuosikerta116
Numero9
TilaJulkaistu - 2014
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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