http://www.cnr.it/ontology/cnr/individuo/prodotto/ID171507
Reset dynamics and latching in niobium superconducting nanowire single-photon detectors (Articolo in rivista)
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- Reset dynamics and latching in niobium superconducting nanowire single-photon detectors (Articolo in rivista) (literal)
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- 2010-01-01T00:00:00+01:00 (literal)
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- 10.1063/1.3498809 (literal)
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1 Annunziata A. J., 2 3 Quaranta O., 1 Santavicca D. F., 2 3 Casaburi A., 1 2 Frunzio L., 2 Ejrnaes M., 1 Rooks M. J., 2 Cristiano R., 4 Pagano S., 5 Frydman A., and Prober D E. (2010)
Reset dynamics and latching in niobium superconducting nanowire single-photon detectors
in Journal of applied physics; American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- 1 Annunziata A. J., 2 3 Quaranta O., 1 Santavicca D. F., 2 3 Casaburi A., 1 2 Frunzio L., 2 Ejrnaes M., 1 Rooks M. J., 2 Cristiano R., 4 Pagano S., 5 Frydman A., and Prober D E. (literal)
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- 1 Department of Applied Physics, Yale University, New Haven, Connecticut 06511, USA;
2 Istituto di Cibernetica \"E. Caianiello,\" CNR, 80078 Pozzuoli, Italy;
3 Dipartmento di Fisica \"E. R. Caianiello,\" Università di Salerno, 84081 Baronissi, Italy;
4 Dip. Matematica e Informatica and CNR-SPIN Salerno, Università di Salerno, 84084 Fisciano, Italy;
5 Department of Physics, Bar-Ilan University, 52520 Ramat Gan, Israel (literal)
- Titolo
- Reset dynamics and latching in niobium superconducting nanowire single-photon detectors (literal)
- Abstract
- We study the reset dynamics of niobium (Nb) superconducting nanowire single-photon detectors (SNSPDs) using experimental measurements and numerical simulations. The numerical simulations of the detection dynamics agree well with experimental measurements, using independently determined parameters in the simulations. We find that if the photon-induced hotspot cools too slowly, the device will latch into a dc resistive state. To avoid latching, the time for the hotspot to cool must be short compared to the inductive time constant that governs the resetting of the current in the device after hotspot formation. From simulations of the energy relaxation process, we find that the hotspot cooling time is determined primarily by the temperature-dependent electron-phonon inelastic time. Latching prevents reset and precludes subsequent photon detection. Fast resetting to the superconducting state is, therefore, essential, and we demonstrate experimentally how this is achieved. We compare our results to studies of reset and latching in niobium nitride SNSPDs. (literal)
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