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Cooperative light scattering from helical-phase-imprinted atomic rings.

H H Jen1, M-S Chang2, Y-C Chen2

  • 1Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan. sappyjen@gmail.com.

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We explored light scattering in atomic rings excited by photons with orbital angular momentum (OAM). Superradiant states scatter forward, while subradiant states scatter transversally, enabling quantum storage and detection.

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Photonics

Background:

  • Atomic rings exhibit unique light scattering properties.
  • Orbital angular momentum (OAM) in photons influences light-matter interactions.
  • Superradiance and subradiance are collective quantum phenomena affecting photon emission.

Purpose of the Study:

  • To theoretically investigate light scattering from atomic rings excited by OAM photons.
  • To analyze the role of polarization and atomic arrangement on scattering patterns.
  • To explore the potential for quantum storage and detection using these states.

Main Methods:

  • Theoretical modeling of light scattering.
  • Analysis of atomic ring symmetries (C4, CN) under linear and circular polarization.
  • Simulation of photon scattering in stacked and concentric atomic ring configurations.

Main Results:

  • Helical phase imprinted (HPI) atomic rings show distinct symmetries based on polarization and atom number.
  • Superradiant modes scatter photons predominantly forward/backward, enhanced by stacking.
  • Subradiant modes scatter transversally; concentric stacking induces crossover to superradiance.

Conclusions:

  • Far-field radiation patterns reveal HPI super- and subradiant states.
  • This offers a method for quantum storage and detection of single OAM photons.