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Multichannel Single-Photon Emissions with On-Demand Momentums by Using Anisotropic Quantum Metasurfaces.

Shangtong Jia1, Yongkang Li1, Zeyang Xue1

  • 1School of Physics, Peking University, Beijing, 100871, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|April 1, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed an anisotropic metasurface to freely control multiple photon momentums. This method independently manipulates spin angular momentum and linear momentum, enhancing quantum information capacity.

Keywords:
anisotropic metasurfaceslinear momentumsingle-photon emissionspin angular momentumsurface plasmon polaritons

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Area of Science:

  • Optics and Photonics
  • Quantum Information Science
  • Materials Science

Background:

  • Controlling photon momentum is crucial for quantum information processing and storage.
  • Existing methods using isotropic metasurfaces face challenges with precise phase control and alignment.

Purpose of the Study:

  • To propose and demonstrate a novel anisotropic metasurface for independent control of multiple photon momentums.
  • To overcome limitations of isotropic metasurfaces in manipulating spin and linear momentum.

Main Methods:

  • Design of an anisotropic metasurface with anisotropically arranged anisotropic nanoscatterers.
  • Utilizing phase-independent schemes for spin angular momentum (SAM) control.
  • Employing phase-dependent schemes for linear momentum (LM) control.

Main Results:

  • Independent control of SAM and LM for single photons.
  • Robust alignment between quantum emitters and metasurfaces via phase-independent scheme.
  • Extended range (up to 53°) for tailoring LMs due to amended geometrical phases for oblique emissions.
  • Experimental demonstration of three-channel single-photon emissions with independent SAMs and LMs.

Conclusions:

  • Anisotropic metasurfaces offer a flexible and efficient approach for tailoring single-photon emissions.
  • The proposed design method provides greater control over photon momentum, advancing quantum information applications.