Multimode-fiber-coupled superconducting nanowire single-photon detectors with high detection efficiency and time resolution

Jin Chang, Iman Esmaeil Zadeh, Johannes W.N. Los, Julien Zichi, Andreas Fognini, Monique Gevers, Sander Dorenbos, Silvania F. Pereira, Paul Urbach, Val Zwiller

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
12 Downloads (Pure)

Abstract

In the past decade, superconducting nanowire single-photon detectors (SNSPDs) have gradually become an indispensable part of any demanding quantum optics experiment. Until now, most SNSPDs have been coupled to single-mode fibers. SNSPDs coupled to multimode fibers have shown promising efficiencies but have yet to achieve high time resolution. For a number of applications ranging from quantum nano-photonics to bio-optics, high efficiency and high time resolution are desired at the same time. In this paper, we demonstrate the role of polarization on the efficiency of multimode-fiber-coupled detectors and fabricated high-performance 20 µm, 25 µm, and 50 µm diameter detectors targeted for visible, near-infrared, and telecom wavelengths. A custom-built setup was used to simulate realistic experiments with randomized modes in the fiber. We achieved over 80% system efficiency and <20 ps timing jitter for 20 µm SNSPDs. Also, we realized 70% system efficiency and <20 ps timing jitter for 50 µm SNSPDs. The high-efficiency multimode-fiber-coupled SNSPDs with unparalleled time resolution will benefit various quantum optics experiments and applications in the future.

Original languageEnglish
Pages (from-to)9803-9807
Number of pages5
JournalApplied Optics
Volume58
Issue number36
DOIs
Publication statusPublished - 2019

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