Superconducting nanowire single photon detectors fabricated from an amorphous Mo{sub 0.75}Ge{sub 0.25} thin film

Journal Article · Mon Jul 14 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4890277· OSTI ID:22311091

Verma, V. B.; Lita, A. E.; Vissers, M. R.; Marsili, F.; Pappas, D. P.; Mirin, R. P.; Nam, S. W. ^[1]

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1. National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305 (United States)

We present the characteristics of superconducting nanowire single photon detectors (SNSPDs) fabricated from amorphous Mo{sub 0.75}Ge{sub 0.25} thin-films. Fabricated devices show a saturation of the internal detection efficiency at temperatures below 1 K, with system dark count rates below 500 cps. Operation in a closed-cycle cryocooler at 2.5 K is possible with system detection efficiencies exceeding 20% for SNSPDs which have not been optimized for high detection efficiency. Jitter is observed to vary between 69 ps at 250 mK and 187 ps at 2.5 K using room temperature amplifiers.

• OSTI ID: 22311091
• Journal Information: Applied Physics Letters, Vol. 105, Issue 2; Other Information: (c) 2014 U.S. Government; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
AMORPHOUS STATE
AMPLIFIERS
COUNTING RATES
DETECTION
EFFICIENCY
GERMANIUM COMPOUNDS
MOLYBDENUM COMPOUNDS
OPERATION
PHOTONS
SATURATION
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0273-0400 K
THIN FILMS