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Two-Photon Spontaneous Emission in Atomically Thin Plasmonic Nanostructures.

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Atomically thin plasmonic nanostructures enable efficient two-photon emission for quantum technologies. This breakthrough enhances light-matter entanglement for quantum information processing and communications.

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Area of Science:

  • Quantum optics and photonics
  • Materials science and nanotechnology

Background:

  • Harnessing light-matter interactions at the few-photon level is crucial for quantum technologies.
  • On-demand single-photon generation is established, but efficient two-photon generation in individual emitters remains challenging due to slow rates compared to one-photon processes.

Purpose of the Study:

  • To demonstrate enhanced two-photon spontaneous emission using atomically thin plasmonic nanostructures.
  • To explore the potential of these nanostructures for generating tailored photonic and plasmonic entangled states.
  • To investigate plasmon-assisted single-photon creation efficiency.

Main Methods:

  • Utilizing atomically thin plasmonic nanostructures to harness two-photon spontaneous emission.
  • Analyzing the interplay between Fano and Lorentzian resonances to understand emission line shapes.
  • Characterizing far-field two-photon production and plasmon-assisted single-photon emission.

Main Results:

  • Achieved giant far-field two-photon production from plasmonic nanostructures.
  • Observed a wealth of resonant modes enabling tailored photonic and plasmonic entangled states.
  • Demonstrated plasmon-assisted single-photon creation orders of magnitude more efficient than standard one-photon emission.

Conclusions:

  • Enhanced two-photon spontaneous emission in 2D nanostructures offers an efficient pathway for light-matter entanglement.
  • This approach is promising for developing on-chip quantum information processing and free-space quantum communications.