%0 Conference Proceedings
%T Single photon counting detector for THz radioastronomy
%A Tarkhov, M.
%A Morozov, D.
%A Mauskopf, P.
%A Seleznev, V.
%A Korneev, A.
%A Kaurova, N.
%A Rubtsova, I.
%A Minaeva, O.
%A Voronov, B.
%A Goltsman, G.
%S Proc. 17[super:th] Int. Symp. Space Terahertz Technol.
%D 2006
%F Tarkhov_etal2006
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=1438), last updated on Mon, 24 May 2021 23:36:07 -0500
%X In this paper we present the results of the research on the superconducting NbN-ultrathin-film single- photon 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 gm wavelength (52 THz) the SSPD exhibits single-photon sensitivity. Reduction of operation temperature to 1.6 K allowed us to measure quantum efficiency of -4% 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.
%K NbN SSPD
%K SNSPD
%U https://www.nrao.edu/meetings/isstt/2006.shtml
%P 119-122