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Updated: Aug 8, 2025

Preparation of Free-Surface Hyperbolic Water Vortices
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Spiral fractional vortex beams.

Lixun Wu, Xuankai Feng, Zhongzheng Lin

    Optics Express
    |March 2, 2023
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrated a new spiral fractional vortex beam with unique radial phase discontinuity. This novel structured light field offers potential advancements in optical information processing and particle manipulation.

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    Area of Science:

    • Optics and Photonics
    • Structured Light Fields
    • Orbital Angular Momentum (OAM)

    Background:

    • Conventional fractional vortex beams exhibit specific intensity and phase patterns.
    • Non-integer orbital angular momentum (OAM) modes typically have azimuthal phase jumps.
    • Spatially structured light fields are crucial for advanced optical applications.

    Purpose of the Study:

    • To demonstrate a novel type of spatially structured light field: the spiral fractional vortex beam.
    • To investigate the unique properties and propagation behavior of these beams.
    • To establish a connection between spiral fractional vortex beams and conventional fractional vortex beams.

    Main Methods:

    • Utilizing spiral transformation to generate spiral fractional vortex beams.
    • Conducting simulations and experimental studies to analyze beam properties.
    • Employing a novel scheme with superimposed spiral phase functions to convert phase discontinuities.

    Main Results:

    • Demonstrated spiral fractional vortex beams with non-integer topological orders and radial phase discontinuity.
    • Observed spiral intensity distributions evolving into focusing annular patterns during propagation.
    • Successfully converted radial phase jumps to azimuthal phase jumps, linking spiral and conventional fractional vortex beams.

    Conclusions:

    • Spiral fractional vortex beams possess distinct characteristics compared to conventional fractional vortex beams.
    • The study reveals an underlying connection between different types of fractional vortex beams.
    • This work is expected to drive new applications in optical information processing and particle manipulation.