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

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

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 co...

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Bibliographische Detailangaben
Hauptverfasser: Fujiwara, Mikio, Miki, Shigehito, Sasaki, Masahide, Wang, Zhen
Format: Tagungsbericht
Sprache:eng
Schlagworte:
COUNTING RATES
CRYOGENICS
EFFICIENCY
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
NIOBIUM NITRIDES
PHOTONS
QUANTUM WIRES
RADIATION DETECTION
RADIATION DETECTORS
SUPERCONDUCTING DEVICES
SURFACES
VELOCITY
WAVELENGTHS
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Beschreibung
Zusammenfassung: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 mum2 or 20X20 mum2, and the system detection efficiency at dark count rate of 100 Hz reached 2.6% at a wavelength of 1550 nm.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.3131327