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Coherence modification and phase singularities on scattering by a sphere: Mie formulation.

Hugo F Schouten, David G Fischer, Taco D Visser

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
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    Summary
    This summary is machine-generated.

    Partially coherent light scattering from spheres shows surprising correlations. The field is highly correlated in some directions but uncorrelated in others, impacting multiple scattering phenomena.

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    Area of Science:

    • Optics and Photonics
    • Wave Scattering Theory

    Background:

    • Light scattering is fundamental to understanding wave interactions with matter.
    • The coherence properties of scattered light dictate its behavior in subsequent interactions.
    • Partially coherent light sources, like sunlight, are ubiquitous in nature.

    Purpose of the Study:

    • To investigate the coherence properties of light scattered by a sphere when illuminated by spatially partially coherent light.
    • To analyze the directional dependence of field correlations in the scattered light.
    • To assess the implications of these coherence properties for multiple scattering processes.

    Main Methods:

    • Theoretical analysis of light scattering from a sphere.
    • Mathematical formulation of coherence properties in the scattered field.
    • Examination of correlation functions in different scattering directions.

    Main Results:

    • Observed oscillatory behavior in the scattered field's coherence.
    • Identification of deep minima indicating high correlation in specific direction pairs.
    • Discovery of directions with essentially uncorrelated fields and correlation singularities.
    • Demonstration of strong directional dependence in scattered light coherence.

    Conclusions:

    • Scattering of partially coherent light by spheres leads to complex and direction-dependent coherence properties.
    • These findings are crucial for understanding multiple scattering in disordered media.
    • The results highlight the importance of considering light source coherence in scattering phenomena.