PT Journal
AU Kozorezov, AG
   Lambert, C
   Marsili, F
   Stevens, MJ
   Verma, VB
   Stern, JA
   Horansky, R
   Dyer, S
   Duff, S
   Pappas, DP
   Lita, A
   Shaw, MD
   Mirin, RP
   Sae Woo Nam
TI Quasiparticle recombination in hotspots in superconducting current-carrying nanowires
JI Phys. Rev. B
PY 2015
VL 92
IS 6
DI 10.1103/PhysRevB.92.064504
LA English
AB We describe a kinetic model of recombination of non-equilibrium quasiparticles generated by single photon absorption in superconducting current-carrying nanowires. The model is developed to interpret two-photon detection experiments in which a single photon does not possess sufficient energy for breaking superconductivity at a fixed low bias current. We show that quasiparticle self- recombination in relaxing hotspot dominates diffusion expansion effects and explains the observed strong bias current, wavelength and temperature dependencies of hotspot relaxation in tungsten silicide superconducting nanowire single-photon detectors.
ER