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Generalized Hanbury Brown-Twiss effect for Stokes parameters.

David Kuebel, Taco D Visser

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |March 16, 2019
    PubMed
    Summary

    Researchers generalized the Hanbury Brown and Twiss (HBT) effect for random electromagnetic beams by analyzing polarization. This revealed complex correlations between Stokes parameters, extending beyond intensity fluctuations.

    Area of Science:

    • Optics and Photonics
    • Quantum Optics
    • Electromagnetism

    Background:

    • The Hanbury Brown and Twiss (HBT) effect traditionally studies intensity correlations in wave fields.
    • Random electromagnetic beams exhibit intensity fluctuations that can be analyzed using correlation functions.

    Purpose of the Study:

    • To generalize the HBT effect by incorporating polarization properties of random electromagnetic beams.
    • To investigate correlations among the fluctuations of the four Stokes parameters.

    Main Methods:

    • Extension of the HBT effect to polarization-resolved measurements.
    • Calculation of correlations for Stokes parameter fluctuations under Gaussian statistics.
    • Analysis of "Stokes scintillations" when observation points coincide.

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    Main Results:

    • Demonstrated that correlations exist among all four Stokes parameters in random beams.
    • Identified that the generalized HBT effect and scintillation coefficient are specific instances of broader correlations.
    • Showcased diverse polarization states exhibiting correlated Stokes fluctuations.

    Conclusions:

    • The study reveals a deeper complexity in random electromagnetic beams beyond simple intensity correlations.
    • Polarization-resolved analysis provides a more comprehensive understanding of wave field fluctuations.
    • Correlations among Stokes parameters are a fundamental property of random beams.