PT Journal
AU Korneev, A
   Korneeva, Y
   Florya, I
   Voronov, B
   Goltsman, G
TI NbN nanowire superconducting single-photon detector for mid-infrared
SO Phys. Procedia
JI Phys. Procedia
PY 2012
BP 72
EP 76
VL 36
DI 10.1016/j.phpro.2012.06.215
DE NbN SSPD; SNSPD
AB Superconducting single-photon detectors (SSPD) is typically 100 nm-wide supercondiucting strip in a shape of meander made of 4-nm-thick film. To reduce response time and increase voltage response a parallel connection of the strips was proposed. Recently we demonstrated that reduction of the strip width improves the quantum effciency of such a detector at wavelengths longer than 1.5 μm. Being encourage by this progress in quantum effciency we improved the fabrication process and made parallel-wire SSPD with 40-nm-wide strips covering total area of 10 μm x 10 μm. In this paper we present the results of the characterization of such a parallel-wire SSPD at 10.6 μm wavelength and demonstrate linear dependence of the count rate on the light power as it should be in case of single-photon response.
ER