TY - GEN
T1 - Single photon counting detector for THz radioastronomy.
AU - Tarkhov, M.
AU - Morozov, D.
AU - Mauskopf, P.
AU - Seleznev, V.
AU - Korneev, A.
AU - Kaurova, N.
AU - Rubtsova, I.
AU - Minaeva, O.
AU - Voronov, B.
AU - Goltsman, G.
PY - 2006/12/1
Y1 - 2006/12/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84883292477
SN - 9781604239751
T3 - 17th International Symposium on Space Terahertz Technology 2006, ISSTT 2006
SP - 77
EP - 80
BT - 17th International Symposium on Space Terahertz Technology 2006, ISSTT 2006
T2 - 17th International Symposium on Space Terahertz Technology 2006, ISSTT 2006
Y2 - 10 May 2006 through 12 May 2006
ER -