Energy-resolved detection of single infrared photons with λ = 8 μm using a superconducting microbolometer

  title={Energy-resolved detection of single infrared photons with $\lambda$ = 8 $\mu$m using a superconducting microbolometer},
  author={Boris S. Karasik and Sergey V. Pereverzev and Alexander Soibel and Daniel F. Santavicca and Daniel E. Prober and David Olaya and Michael E. Gershenson},
  journal={Applied Physics Letters},
We report on the detection of single photons with λ = 8 μm using a superconducting hot-electron microbolometer. The sensing element is a titanium transition-edge sensor with a volume ∼0.1 μm3 fabricated on a silicon substrate. Poisson photon counting statistics including simultaneous detection of 3 photons was observed. The width of the photon-number peaks was 0.11 eV, 70% of the photon energy, at 50–100 mK. This achieved energy resolution is one of the best figures reported so far for… 

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