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Composite spiral multi-value zone plates.

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    We developed composite spiral phase zone plates that create controllable petal-like light modes and dark optical ring lattices. These novel diffractive elements offer precise control over light beam shaping for advanced optical applications.

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    Area of Science:

    • Optics and Photonics
    • Diffractive Optics
    • Light Beam Shaping

    Background:

    • Spiral phase zone plates (SPZPs) are essential diffractive optical elements.
    • Controlling light intensity distributions and topological charges is crucial for optical applications.

    Purpose of the Study:

    • To introduce composite spiral multi-value phase zone plates (CSMV-PZPs).
    • To demonstrate the capability of CSMV-PZPs in generating structured light.
    • To investigate controllable rotation of generated light modes.

    Main Methods:

    • Sectioning a spiral multi-value phase zone plate into radial regions.
    • Optimizing Fresnel zones and embedding topological charges.
    • Numerical simulations and experimental verification using spatial light modulators.

    Main Results:

    • Generation of equal intensity arrays of petal-like modes.
    • Formation of dark optical ring lattice structures in multiple focal planes.
    • Controllable rotation of petal-like modes independent of diffraction order.

    Conclusions:

    • CSMV-PZPs offer a versatile platform for generating complex optical patterns.
    • The controllable rotation capability enhances the utility of these diffractive elements.
    • Experimental validation confirms the theoretical predictions for structured light generation.