Determining the depairing current in superconducting nanowire single-photon detectors
S. Frasca, B. Korzh, M. Colangelo, D. Zhu, A. E. Lita, J. P. Allmaras, E. E. Wollman, V. B. Verma, A. E. Dane, E. Ramirez, A. D. Beyer, S. W. Nam, A. G. Kozorezov, M. D. Shaw, K. K. Berggren
DOI 10.1103/PhysRevB.100.054520 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We estimate the depairing current of superconducting nanowire single-photon detectors (SNSPDs) by studying the dependence of the nanowires' kinetic inductance on their bias current. The kinetic inductance is determined by measuring the resonance frequency of resonator-style nanowire coplanar waveguides both in transmission and reflection configurations. Bias current dependent shifts in the measured resonant frequency correspond to the change in the kinetic inductance, which can be compared with theoretical predictions. We demonstrate that the fast relaxation model described in the literature accurately matches our experimental data and provides a valuable tool for determination of the depairing current. Accurate measurement of the depairing current is critical for nanowire quality analysis, as well as modeling efforts aimed at understanding the detection mechanism in SNSPDs.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.65 | Pressure not reported | unknown |
| WSi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.5 | Pressure not reported | unknown |
Similar papers
Saturating Intrinsic Detection Efficiency of Superconducting Nanowire Single-Photon Detectors via Defect Engineering
similarity 0.96Weijun Zhang et al.
Source status unknown — claims are unverified
Timing jitter in photon detection by straight superconducting nanowires: Effect of magnetic field and photon flux
similarity 0.95Mariia Sidorova et al.
Source status unknown — claims are unverified
Effect of magnetic field on the photon detection in thin superconducting meander structures
similarity 0.95R. Lusche et al.
Source status unknown — claims are unverified
Effect of temperature oscillations on kinetic inductance and depairing in thin and narrow superconducting nanowire resonators
similarity 0.94Jason P. Allmaras et al.
Source status unknown — claims are unverified
Superconducting properties of perforated NbN films using ordered arrays of ferromagnetic nanowires
similarity 0.94X. Hallet et al.
Source status unknown — claims are unverified
Time delay of resistive-state formation in superconducting stripes excited by single optical photons
similarity 0.94J. Zhang et al.
Source status unknown — claims are unverified