TY  - CONF
AU  - Gol’tsman, G.
AU  - Korneev, A.
AU  - Tarkhov, M.
AU  - Seleznev, V.
AU  - Divochiy, A.
AU  - Minaeva, O.
AU  - Kaurova, N.
AU  - Voronov, B.
AU  - Okunev, O.
AU  - Chulkova, G.
AU  - Milostnaya, I.
AU  - Smirnov, K.
PY  - 2007
DA  - 2007//
TI  - Middle-infrared ultrafast superconducting single photon detector
T2  - 32nd IRMW / 15th ICTE
BT  - 32nd IRMW / 15th ICTE
SP  - 115
EP  - 116
KW  - SSPD
KW  - SNSPD
AB  - We present the results of the research on quantum efficiency of the ultrathin-film superconducting single-photon detectors (SSPD) in the wavelength rage from 1 mum to 5.7 mum. Reduction of operation temperature to 1.6 K allowed us to measure quantum efficiency of ~1 % at 5.7 mum wavelength with the SSPD made from 4-nm-thick NbN film. In a pursuit of further performance improvement we endeavored SSPD fabricating from 4-nm-thick MoRe film as an alternative material. The MoRe film exhibited transition temperature of 7.7K, critical current density at 4.2 K temperature was 1.1times10 6 A/cm 2 , and diffusivity 1.73 cmVs. The single-photon response was observed with MoRe SSPD at 1.3 mum wavelength with quantum efficiency estimated to be 0.04%.
UR  - https://doi.org/10.1109/ICIMW.2007.4516419
DO  - 10.1109/ICIMW.2007.4516419
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1246), last updated on Sun, 16 May 2021 12:41:02 -0500
ID  - Goltsman_etal2007
ER  -