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Related Experiment Videos

Mid-infrared single-photon counting.

Guilherme Temporão1, Sébastien Tanzilli, Hugo Zbinden

  • 1Group of Applied Physics, University of Geneva, 1211 Geneva 4, Switzerland. guilherme.temporao@physics.unige.ch

Optics Letters
|April 22, 2006
PubMed
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We developed a new method for detecting mid-infrared single photons using sum-frequency generation. This technique achieves high timing resolution and sensitive detection of 1.24 picowatts.

Area of Science:

  • Quantum Optics
  • Photonics
  • Nonlinear Optics

Background:

  • Single-photon detection is crucial for quantum information science.
  • Mid-infrared (mid-IR) wavelengths present unique challenges for photon detection.

Purpose of the Study:

  • To develop a novel procedure for detecting mid-infrared single photons.
  • To achieve high sensitivity and timing resolution in mid-IR single-photon detection.

Main Methods:

  • Employed a two-stage sum-frequency generation (SFG) scheme.
  • Utilized a periodically poled lithium niobate (PPLN) nonlinear crystal.
  • Used a silicon avalanche photodiode (Si-APD) for detection.

Main Results:

  • Successfully detected single photons at 4.65 micrometers.

Related Experiment Videos

  • Achieved a detection sensitivity of 1.24 picowatts (pW).
  • Demonstrated high timing resolution with 63 mW of net pump power.

    • Conclusions:

    • The developed SFG-based procedure is effective for mid-IR single-photon detection.
    • The technique offers a promising solution for applications requiring sensitive mid-IR photon counting.
    • This advancement contributes to the field of quantum technologies operating in the mid-infrared spectrum.