Superconducting nanowire single-photon detectors at a wavelength of 940 nm
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Quantum Information and Cryptography · Photonic and Optical Devices · Advanced Fiber Laser Technologies
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Affiliations
Chinese Academy of Sciences (CAS) State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), , 865 Changning Rd., Shanghai 200050, China
Funding
973 Program of China · Strategic Priority Research Program (B) of CAS · National Natural Science Foundation of China
References (26)
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