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Proceedings Paper

Background-limited superconducting quantum detector for submillimeter astronomy
Author(s): Alexei Semenov; Andreas Engel; Heinz-Wilhelm Huebers; Konstantin II'in; Michael Siegel
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Paper Abstract

We extend the concept of the superconducting quantum counter in order to develop a new quantum detector for submillimeter astronomy. The detector exploits a cumulative detection mechanism, in which the response appears due to successive formation of the normal spot and a resistive domain in a narrow strip carrying sub-critical supercurrent. The intrinsic recovery time of the counter is partly determined by diffusion of nonequilibrium electrons and, thus, depends on the energy of detected photons. Depending on the superconducting material used and operation conditions, such detector may have cut-off wavelengths for the single-photon regime ranging from terahertz waves to visible light and simultaneously provide a moderate energy resolution. We simulated performance of the background-limited submillimeter direct detector from Ti having the 100-micrometer cut-off wavelength, low dark count rate and intrinsic 10-21 W Hz-1/2 noise equivalent power for 4-K background radiation. We present first results obtained with a detector prototype fabricated from ultra-thin Nb film.

Paper Details

Date Published: 17 February 2003
PDF: 5 pages
Proc. SPIE 4855, Millimeter and Submillimeter Detectors for Astronomy, (17 February 2003); doi: 10.1117/12.459180
Show Author Affiliations
Alexei Semenov, Deutsches Zentrum fuer Luft- und Raumfahrt e.V. (Germany)
Andreas Engel, Deutsches Zentrum fuer Luft- und Raumfahrt e.V. (Germany)
Heinz-Wilhelm Huebers, Deutsches Zentrum fuer Luft- und Raumfahrt e.V. (Germany)
Konstantin II'in, Forschungszentrum Juelich GmbH (Germany)
Michael Siegel, Forschungszentrum Juelich GmbH (Germany)

Published in SPIE Proceedings Vol. 4855:
Millimeter and Submillimeter Detectors for Astronomy
Thomas G. Phillips; Jonas Zmuidzinas, Editor(s)

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