Astrophysics (Index)About

superconducting tunnel junction

(STJ)
(type of Josephson junction usable in EMR sensors)

A superconducting tunnel junction (STJ) is a type of EMR sensor that makes use of a particular kind of quantum tunneling (photon-assisted tunneling, PAT) and can be used to detect over a wide frequency range: ultraviolet to X-rays, essentially a kind of bolometer. The device needs to be cryogenically cooled for the superconductivity. A common type uses a superconductor-insulator-superconductor (SIS) junction, a configuration fitting that description, the insulator is extremely thin. Often, the entire sensor is referred to as an SIS.


(instrument type,EMR)
Further reading:
http://en.wikipedia.org/wiki/Superconducting_tunnel_junction
https://ui.adsabs.harvard.edu/abs/2010ISSIR...9..441M/abstract
http://www.iram.fr/IRAMFR/IS/IS2002/html_1/node25.html

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