Laser-induced relaxation oscillations in superconducting nanobridge single-photon detectors
F.B. Baalbergen, I.E. Zadeh, M.J.A. de Dood
DOI 10.1103/cxv8-fqy9 · Physical Review Applied
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Abstract
We demonstrate laser-induced relaxation oscillations in superconducting nanowire single-photon detectors (SNSPDs). These oscillations appear when a voltage-biased NbTiN nanobridge detector is illuminated with intense pulsed-laser light at a repetition rate of approximately 19MHz. They differ from the well-known relaxation oscillations by a stepwise increase in frequency and phase locking of the oscillations to the laser pulses. We create a model that incorporates electrical feedback and excludes thermal effects to simulate and explain the origin of the observed laser-induced relaxation oscillations. Qualitative agreement to the experiment is achieved using realistic values for the parameters in the model.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbTiN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.1 | Pressure not reported | midpoint |
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