Large-sensitive-area superconducting nanowire single-photon detector at 850 nm with high detection efficiency

Abstract

Satellite-ground quantum communication requires single-photon detectors of 850-nm wavelength with both high detection efficiency and large sensitive area. We developed superconducting nanowire single-photon detectors (SNSPDs) on one-dimensional photonic crystals, which acted as optical cavities to enhance the optical absorption, with a sensitive-area diameter of 50 um. The fabricated multimode fiber coupled NbN SNSPDs exhibited a maximum system detection efficiency (DE) of up to 82% and a DE of 78% at a dark count rate of 100 Hz at 850-nm wavelength as well as a system jitter of 105 ps.

8 pages, 4 figures

References in corpus (3)

• Measurement-device-independent quantum key distribution over 200 km
• Optical Properties of Superconducting Nanowire Single-Photon Detectors
• Jitter analysis of a superconducting nanowire single photon detector

Cited by in corpus (6)

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• Multimode Fiber Coupled Superconducting Nanowire Single Photon Detectors with High Detection Efficiency and Time Resolution
• Information processing at the speed of light
• Position Sensitive Response of a Single-Pixel Large-Area SNSPD