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Title: Waveguide-integrated single- and multi-photon detection at telecom wavelengths using superconducting nanowires

We investigate single- and multi-photon detection regimes of superconducting nanowire detectors embedded in silicon nitride nanophotonic circuits. At near-infrared wavelengths, simultaneous detection of up to three photons is observed for 120 nm wide nanowires biased far from the critical current, while narrow nanowires below 100 nm provide efficient single photon detection. A theoretical model is proposed to determine the different detection regimes and to calculate the corresponding internal quantum efficiency. The predicted saturation of the internal quantum efficiency in the single photon regime agrees well with plateau behavior observed at high bias currents.
Authors:
;  [1] ;  [1] ;  [2] ;  [3] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76132 (Germany)
  2. (Russian Federation)
  3. Department of Physics, Moscow State Pedagogical University, Moscow 119992 (Russian Federation)
  4. (State University), Moscow 141700 (Russian Federation)
  5. (Germany)
Publication Date:
OSTI Identifier:
22398882
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRITICAL CURRENT; DETECTION; ELECTRIC CURRENTS; MULTI-PHOTON PROCESSES; NANOWIRES; NEAR INFRARED RADIATION; PHOTONS; QUANTUM EFFICIENCY; SILICON NITRIDES; SUPERCONDUCTING WIRES; WAVEGUIDES; WAVELENGTHS