Rights statement: © 2015 American Physical Society
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Quasiparticle recombination in hotspots in superconducting current-carrying nanowires
AU - Kozorezov, A. G.
AU - Lambert, Colin
AU - Marsili, F.
AU - Stevens, M. J.
AU - Verma, V. B.
AU - Stern, J. A.
AU - Horansky, R.
AU - Dyer, S.
AU - Duff, S.
AU - Pappas, D. P.
AU - Lita, A.
AU - Shaw, M. D.
AU - Mirin, R. P.
AU - Nam, Sae Woo
N1 - © 2015 American Physical Society
PY - 2015/8/1
Y1 - 2015/8/1
N2 - We describe a kinetic model of recombination of nonequilibrium 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 hotspots 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.
AB - We describe a kinetic model of recombination of nonequilibrium 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 hotspots 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.
KW - SINGLE-PHOTON DETECTORS
KW - TRANSITION-EDGE SENSORS
KW - TUNGSTEN-SILICIDE
KW - EFFICIENCY
KW - STRIPS
KW - FILM
U2 - 10.1103/PhysRevB.92.064504
DO - 10.1103/PhysRevB.92.064504
M3 - Journal article
VL - 92
JO - Physical review B
JF - Physical review B
SN - 1098-0121
IS - 6
M1 - 064504
ER -