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Journal of Low Temperature Physics

, Volume 93, Issue 3–4, pp 659–664 | Cite as

UV to IR photon detection using superconducting tunnel junctions

  • N. Rando
  • A. Peacock
  • M. A. C. Perryman
  • P. Hübner
  • A. van Dordrecht
  • P. Videler
  • J. Lumley
Superconducting Films And Tunnel Junction Detectors

Abstract

Superconducting Tunnel Junctions have been investigated in the past as particle and X-ray detectors. We report here on results obtained illuminating Nb-Al-AlOx-Nb junctions with radiation covering the UV to IR (250 – 1100 nm) at 0.30 K. In the presence of continuous illumination, an increase of the subgap current is observed, while the change is found to be consistent with the amount of energy supplied to the junction. Several measurements have been performed in a pulsed mode, showing the detection of pulses containing about 100 photons each, at λ=850 nm. These results have allowed a determination of the mean energy required to create a single charge carrier in Nb, which agrees well with theoretical predictions. Such results open new possibilities for the fabrication of optical photon counting cameras based on Josephson junctions.

Keywords

Radiation Charge Carrier Magnetic Material Theoretical Prediction Pulse Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • N. Rando
    • 1
  • A. Peacock
    • 1
  • M. A. C. Perryman
    • 1
  • P. Hübner
    • 1
  • A. van Dordrecht
    • 1
  • P. Videler
    • 1
  • J. Lumley
    • 1
    • 2
  1. 1.Astrophysics Division, Space Science Department of the European Space AgencyESTECNoordwijkThe Netherlands
  2. 2.Scientific Research DivisionOxford InstrumentsCambridgeUK

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