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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Backscattered polarization patterns determined by conservation of angular momentum.

Chaim Schwartz1, Aristide Dogariu

  • 1CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, USA.

Journal of the Optical Society of America. A, Optics, Image Science, and Vision
|February 5, 2008
PubMed
Summary

Backscattered light polarization patterns are linked to the conservation of light's angular momentum. A new model explains these patterns by accounting for helicity-maintaining and -flipping scattering processes, clarifying Mueller matrix symmetries.

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Area of Science:

  • Optics and Photonics
  • Quantum Optics
  • Light Scattering

Background:

  • Polarization patterns in backscattered light are complex phenomena.
  • Understanding these patterns is crucial for applications in imaging and sensing.
  • The role of angular momentum in light scattering requires further theoretical elucidation.

Purpose of the Study:

  • To demonstrate the relationship between backscattered polarization patterns and the conservation of angular momentum.
  • To develop a theoretical model explaining multiple-scattering processes in terms of light's spin.
  • To account for symmetries observed in spatially resolved Mueller matrices.

Main Methods:

  • Utilizing the geometrical phase formalism in the spin space.
  • Developing a model to describe helicity-maintaining scattering.
  • Developing a model to describe helicity-flipping scattering.

Main Results:

  • Established a direct link between backscattered polarization and angular momentum conservation.
  • Successfully modeled both helicity-maintaining and helicity-flipping multiple-scattering.
  • The developed model explains observed symmetries in spatially resolved Mueller matrices.

Conclusions:

  • The conservation of angular momentum is fundamental to backscattered polarization patterns.
  • The geometrical phase formalism provides a robust framework for modeling light-matter interactions in scattering.
  • The model offers a comprehensive explanation for Mueller matrix symmetries in scattering systems.