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Related Experiment Video

Updated: Jan 8, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Chirality-switchable spatially structured light via phase-segmentation modulation.

Yujiang Liu, Ran Zhang, Yujie Yang

    Optics Express
    |December 19, 2025
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed chirality-switchable spatially structured light (CSSSL) by dividing light wavefronts. This method allows for controllable optical properties and opens new avenues in optical manipulation and fabrication.

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    Area of Science:

    • Optics and Photonics
    • Light-Matter Interactions

    Background:

    • Generating structured light with switchable chirality is crucial for advanced optical applications.
    • Existing methods often lack flexibility or direct control over chirality in intensity patterns.

    Purpose of the Study:

    • To present a novel method for generating chirality-switchable spatially structured light (CSSSL).
    • To investigate the underlying physical mechanisms governing CSSSL generation and properties.
    • To demonstrate the flexible generation of various CSSSL modes for diverse applications.

    Main Methods:

    • Utilizing a spatial light modulator (SLM) to segment the wavefront into two zones with distinct topological charges (l1 ≠ l2).
    • Analyzing the Poynting vector and phase patterns to understand interference phenomena.
    • Investigating the influence of the ratio between topological charges on interference structures and energy flow.

    Main Results:

    • Demonstrated CSSSL generation by controlling phase singularities and their translation into intensity modulations.
    • Revealed that the vortex beam phase exhibits a rotational tendency that reverses around the focal plane.
    • Showcased the generation of multiple CSSSL modes, including petal-like and double-ring patterns, by adjusting topological charge magnitudes.

    Conclusions:

    • CSSSL provides a versatile platform for extending helicity inversion from phase to intensity patterns.
    • The method offers significant potential for applications in optical micromanipulation, chiral fabrication, information encoding, and precision detection.
    • The developed technique enables flexible control over optical energy flow and structured light generation.