Multiple channelling single-photon emission with scattering holography designed metasurfaces

Area of Science:

• Quantum optics
• Nanophotonics
• Materials science

Background:

• Controlling single-photon emission direction and polarization is crucial for quantum technologies.
• Existing methods often lack the precision for multiple, well-defined outputs.

Purpose of the Study:

• To demonstrate a novel approach for channelling single-photon emission into multiple directions with controlled polarization.
• To enable on-chip integration for practical quantum applications.

Main Methods:

• Utilizing quantum emitters (QEs) nonradiatively coupled to surface plasmon polaritons (SPPs).
• Employing scattering holography with radially diverging SPPs as reference waves.
• Fabricating holographic metasurfaces around nanodiamonds with single Germanium vacancy (GeV) centers.

Main Results:

• Demonstrated efficient generation of two collimated single-photon beams.
• Achieved emission along two distinct 15° off-normal directions.
• Confirmed orthogonal linear polarizations for the generated beams.

Conclusions:

• The developed QE-coupled metasurface approach offers precise control over single-photon emission.
• This method is a significant advancement for integrated quantum photonic devices.
• The technique holds promise for various quantum information processing and communication applications.