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One exposure processing to fabricate spiral phase plate with continuous surface.

Lifang Shi, Zhiyou Zhang, Axiu Cao

    Optics Express
    |May 14, 2015
    PubMed
    Summary

    This study introduces an economical method for fabricating spiral phase plates (SPPs) using a quantized binary mask for precise exposure control. High-quality SPPs with various topological charges were successfully produced and verified.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Spiral Phase Plates (SPPs) are crucial optical elements for applications involving vortex beams.
    • Traditional fabrication methods can be complex and costly.

    Purpose of the Study:

    • To propose an economical and reliable method for fabricating continuous surface Spiral Phase Plates (SPPs).
    • To demonstrate the fabrication of high-quality SPPs with diverse topological charges.

    Main Methods:

    • A novel approach using interval quantization to convert the 3D SPP surface into a 2D binary mask.
    • Precise control of exposure dose during the fabrication process via the binary mask.
    • Detailed discussion on quantization interval selection and fabrication procedures.

    Main Results:

    • Successful fabrication of four distinct high-quality SPPs with varying topological charges.
    • Morphology analysis confirmed the accuracy of the fabricated SPP structures.
    • Optical measurements validated the performance and reliability of the developed fabrication technique.

    Conclusions:

    • The proposed method offers an economical and effective way to fabricate continuous surface SPPs.
    • The technique is reliable for producing SPPs with specific topological charges for optical applications.