Nonlinear response of telecom-wavelength superconducting single-photon detectors
Abstrak
We measure the nonlinearity of a telecom-wavelength superconducting nanowire single-photon detector via incoherent beam combination. At typical photon count rates and detector bias current, the observed relative deviation from a perfectly linear response is in the order of 0.1% when the flux is doubled. This arises from a balance between the counteracting nonlinearities of dead time-induced detector saturation and of multi-photon detections. The observed behavior is modeled empirically, which suffices for a correction of measured data. In addition, statistical simulations, taking into account the measured recovery of the detection efficiency (90%-recovery after about 100 ns), provide insight into possible mechanisms of multi-photon detection.
Topik & Kata Kunci
Penulis (5)
Patrick Mark
Sebastian Gstir
Julian Münzberg
Gregor Weihs
Robert Keil
Akses Cepat
- Tahun Terbit
- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1063/5.0231297
- Akses
- Open Access ✓