Multi-channeled NbN superconducting single photon detectors (SSPDs) system with NbN meander nanowires

Journal Article · Mon Apr 13 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3131327· OSTI ID:21301063

Fujiwara, Mikio; Sasaki, Masahide ^[1]; Miki, Shigehito; Zhen, Wang ^[2]

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1. National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitama, Koganei, Tokyo 184-8795 (Japan)
2. Kobe Advanced Research Center, National Institute of Information and Communications Technology, 588-2, Iwaoka, Nishi-ku, Kobe, Hyogo 651-2492 (Japan)

A superconducting single photon detector (SSPD) is promising candidate of the detector in a quantum key distribution (QKD) system, because of its low dark count and high speed repetition rate. We have developed the SSPD system cooled by a GM cryocooler. In this system, and the work surface can be cooled 2.95 K and up to 6 SSPDs can be installed. The active areas of SSPDs are 10x10 {mu}m{sup 2} or 20x20 {mu}m{sup 2}, and the system detection efficiency at dark count rate of 100 Hz reached 2.6% at a wavelength of 1550 nm.

• OSTI ID: 21301063
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1110; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COUNTING RATES
CRYOGENICS
EFFICIENCY
NIOBIUM NITRIDES
PHOTONS
QUANTUM WIRES
RADIATION DETECTION
RADIATION DETECTORS
SUPERCONDUCTING DEVICES
SURFACES
VELOCITY
WAVELENGTHS