PT Journal
AU Korneeva, Y
   Florya, I
   Semenov, A
   Korneev, A
   Goltsman, G
TI New generation of nanowire NbN superconducting single-photon detector for mid-infrared
SO IEEE Trans. Appl. Supercond.
JI IEEE Trans. Appl. Supercond.
PY 2011
BP 323
EP 326
VL 21
IS 3
DI 10.1109/TASC.2010.2087740
DE SSPD
AB We present a break-through approach to mid-infrared single-photon detection based on nanowire NbN superconducting single-photon detectors (SSPD). Although SSPD became a mature technology for telecom wavelengths (1.3-1.55 μm) its further expansion to mid-infrared wavelength was hampered by low sensitivity above 2 μm. We managed to overcome this limit by reducing the nanowire width to 50 nm, while retaining high superconducting properties and connecting the wires in parallel to produce a voltage response of sufficient magnitude. The new device exhibits 10 times better quantum efficiency at 3.5 μm wavelength than the “standard” SSPD.
ER