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Twisted Gaussian Schell-model array beams.

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    We developed new twisted partially coherent sources that create rotating Gaussian array profiles. These sources offer controllable rotation for applications like optical trapping.

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    Area of Science:

    • Optics and Photonics
    • Coherent Beam Propagation

    Background:

    • Partially coherent light sources are crucial for various optical applications.
    • Controlling beam propagation characteristics, such as irradiance and coherence, is an active research area.

    Purpose of the Study:

    • To introduce a novel class of twisted partially coherent sources.
    • To derive and analyze the propagation characteristics of beams generated by these sources.

    Main Methods:

    • Derivation of the general analytical formula for the cross-spectral density function.
    • Analysis of beam propagation in free space.

    Main Results:

    • The irradiance profile and degree of coherence rotate in opposite directions during propagation.
    • The twist effects on spectral density and coherence are quantified.
    • The direction of rotation can be altered during propagation.

    Conclusions:

    • The novel sources produce unique rotating Gaussian array profiles.
    • The findings offer new insights into twist phase phenomena.
    • Potential applications in optical trapping and manipulation exist.