Single photon counting detector for THz radioastronomy.

M. Tarkhov, D. Morozov, P. Mauskopf, V. Seleznev, A. Korneev, N. Kaurova, I. Rubtsova, O. Minaeva, B. Voronov, G. Goltsman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In this paper we present the results of the research on the superconducting NbN-ultrathin-film singlephoton detectors (SSPD) which are capable to detect single quanta in middle IR range. The detection mechanism is based on the hotspot formation in quasi-two-dimensional superconducting structures upon photon absorption. Spectral measurements showed that up to 5.7 μm wavelength (52 THz) the SSPD exhibits single-photon sensitivity. Reduction of operation temperature to 1.6 K allowed us to measure quantum efficiency of ~1% at 60 THz. Although further decrease of the operation temperature far below 1 K does not lead to any significant increase of quantum efficiency. We expect that the improvement of the SSPD's performance at reduced operation temperature will make SSPD a practical detector with high characteristics for much lower THz frequencies as well. Index Terms- Superconducting single photon detector, Hot spot, Infrared range, ultrathin films.

Original languageEnglish (US)
Title of host publication17th International Symposium on Space Terahertz Technology 2006, ISSTT 2006
Pages77-80
Number of pages4
StatePublished - Dec 1 2006
Externally publishedYes
Event17th International Symposium on Space Terahertz Technology 2006, ISSTT 2006 - Paris, France
Duration: May 10 2006May 12 2006

Publication series

Name17th International Symposium on Space Terahertz Technology 2006, ISSTT 2006

Other

Other17th International Symposium on Space Terahertz Technology 2006, ISSTT 2006
CountryFrance
CityParis
Period5/10/065/12/06

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Space and Planetary Science
  • Atomic and Molecular Physics, and Optics
  • Radiation

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