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Phase singularities of the coherence functions in Young's interference pattern.

Hugo F Schouten1, Greg Gbur, Taco D Visser

  • 1Department of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.

Optics Letters
|July 3, 2003
PubMed
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Researchers discovered phase singularities in the spectral degree of coherence for partially coherent light. This finding extends singular optics to correlation function phase singularities.

Area of Science:

  • Optics
  • Quantum Optics
  • Classical Optics

Background:

  • Partially coherent light fields are fundamental in various optical phenomena.
  • Phase singularities are topological defects in wave fields.
  • The study of coherence properties is crucial for understanding light-matter interactions.

Purpose of the Study:

  • To investigate the coherence properties of a partially coherent field from two pinholes.
  • To identify and analyze phase singularities in the spectral degree of coherence.
  • To extend the principles of singular optics to correlation functions.

Main Methods:

  • Analysis of the spectral degree of coherence for light emerging from two pinholes.
  • Mathematical formulation to identify surfaces with phase singularities.

Related Experiment Videos

  • Theoretical investigation of the superposition region of the light field.

    • Main Results:

    • Phase singularities were observed on specific surfaces within the superposition region.
    • The spectral degree of coherence exhibits singular behavior.
    • This represents the first illustration of phase singularities in the spectral degree of coherence.

    Conclusions:

    • The spectral degree of coherence of partially coherent light can exhibit phase singularities.
    • Singular optics can be extended to encompass phase singularities of correlation functions.
    • This research opens new avenues for exploring topological properties in optical coherence.