Direct measurement of the recovery time of superconducting nanowire single-photon detectors

• URL: http://arxiv.org/abs/2003.06290v1
• Date: Thu, 12 Mar 2020 13:26:03 GMT
• Title: Direct measurement of the recovery time of superconducting nanowire single-photon detectors
• Authors: Claire Autebert, Ga\"etan Gras, Emna Amri, Matthieu Perrenoud, Misael Caloz, Hugo Zbinden, F\'elix Bussi\`eres
• Abstract summary: Superconducting nanowire single-photon detectors (SNSPDs) can feature extremely short recovery times in free-running mode. We introduce a method to characterise precisely the recovery time of SNSPDs. It provides full information about the recovery of the efficiency in time for a single or several consecutive detections.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: One of the key properties of single-photon detectors is their recovery time, i.e. the time required for the detector to recover its nominal efficiency. In the case of superconducting nanowire single-photon detectors (SNSPDs), which can feature extremely short recovery times in free-running mode, a precise characterisation of this recovery time and its time dynamics is essential for many quantum optics or quantum communication experiments. We introduce a fast and simple method to characterise precisely the recovery time of SNSPDs. It provides full information about the recovery of the efficiency in time for a single or several consecutive detections. We also show how the method can be used to gain insight into the behaviour of the bias current inside the nanowire after a detection, which allows predicting the behaviour of the detector and its efficiency in any practical experiment using these detectors.

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