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Correlation singularities in partially coherent electromagnetic beams.

Shreyas B Raghunathan1, Hugo F Schouten, Taco D Visser

  • 1Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Delft 2628 CD, The Netherlands.

Optics Letters
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PubMed
Summary
This summary is machine-generated.

Coherence vortices, singularities in light's correlation function, are found in partially coherent electromagnetic beams. Their location forms a closed string, impacting interference and intensity fluctuation measurements.

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Area of Science:

  • Optics and Photonics
  • Electromagnetism
  • Wave Phenomena

Background:

  • Partially coherent beams exhibit complex correlation properties.
  • Singularities in correlation functions, known as coherence vortices, are of theoretical interest.
  • Understanding these vortices is crucial for applications involving light propagation and measurement.

Purpose of the Study:

  • To demonstrate the general occurrence of coherence vortices in partially coherent electromagnetic beams.
  • To investigate the spatial distribution and behavior of these vortices.
  • To explore the implications of coherence vortices for optical experiments.

Main Methods:

  • Analysis of the correlation function for partially coherent electromagnetic beams.
  • Study of Gaussian Schell-model beams.
  • Tracking the locus of coherence vortices in successive cross sections.

Main Results:

  • Coherence vortices generally occur in partially coherent electromagnetic beams.
  • The locus of coherence vortices in Gaussian Schell-model beams forms a closed string.
  • These findings provide insights into the structure of partially coherent light.

Conclusions:

  • Coherence vortices are a general feature of partially coherent electromagnetic beams.
  • The closed-string locus of these vortices has significant implications for optical metrology.
  • Further research can explore the role of coherence vortices in advanced optical systems.