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Metasurface interferometry toward quantum sensors.

Philip Georgi1, Marcello Massaro1, Kai-Hong Luo1

  • 11Paderborn University, Department of Physics, Warburger Str. 100, 33098 Paderborn, Germany.

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Summary
This summary is machine-generated.

Researchers created a hybrid quantum system using optical metasurfaces to entangle and disentangle photon pairs. This breakthrough enables precise wavefront control for advanced quantum technologies like computing and sensing.

Keywords:
MetamaterialsQuantum opticsSingle photons and quantum effects

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Area of Science:

  • Quantum Photonics
  • Metasurface Technology
  • Integrated Quantum Systems

Background:

  • Optical metasurfaces offer precise light control for quantum technology.
  • Hybrid integrated systems are crucial for advanced quantum applications.

Purpose of the Study:

  • To demonstrate a hybrid integrated quantum photonic system using dielectric metasurfaces.
  • To achieve entanglement and disentanglement of two-photon spin states.
  • To explore metasurface capabilities for quantum information processing.

Main Methods:

  • Utilizing nanostructured dielectric metasurfaces for single-photon pair interference.
  • Generating path-entangled two-photon NOON states with circular polarization.
  • Implementing a metasurface-based interferometer to measure nonclassicality and phase sensitivity.

Main Results:

  • Achieved 86 ± 4% quantum HOM interference visibility for a path-entangled NOON state.
  • Demonstrated metasurface-induced path entanglement with 86.8 ± 1.1% fringe visibility in coincidence counts.
  • Confirmed nonclassicality and phase sensitivity within the metasurface interferometer.

Conclusions:

  • The developed hybrid system effectively entangles and disentangles two-photon states using dielectric metasurfaces.
  • High interference visibility validates the metasurface's role in inducing path entanglement.
  • This work paves the way for hybrid-integrated quantum technologies in high-dimensional spaces for imaging, sensing, and computing.