Superconducting nanowire single-photon detectors at a wavelength of 940 nm

Journal Article · Mon Jun 15 00:00:00 EDT 2015 · AIP Advances

DOI:https://doi.org/10.1063/1.4922548· OSTI ID:22584029

Zhang, W. J.; Li, H.; He, Y. H.; Zhang, L.; Liu, X. Y.; Yang, X. Y.; Wu, J. J.; Guo, Q.; Chen, S. J.; Wang, Z.; Xie, X. M. ^[1]

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1. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), 865 Changning Rd., Shanghai 200050 (China)

We develop single-photon detectors comprising single-mode fiber-coupled superconducting nanowires, with high system detection efficiencies at a wavelength of 940 nm. The detector comprises a 6.5-nm-thick, 110-nm-wide NbN nanowire meander fabricated onto a Si substrate with a distributed Bragg reflector for enhancing the optical absorptance. We demonstrate that, via the design of a low filling factor (1/3) and active area (Φ = 10 μm), the system reaches a detection efficiency of ∼60% with a dark count rate of 10 Hz, a recovery time <12 ns, and a timing jitter of ∼50 ps.

• OSTI ID: 22584029
• Journal Information: AIP Advances, Vol. 5, Issue 6; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
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SUBSTRATES
WAVELENGTHS