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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Liquid crystal (LC) alignment is crucial for optical devices.
    • Pancharatnam-Berry (PB) phase elements offer unique optical functionalities.
    • Existing patterning techniques can be complex and time-consuming.

    Purpose of the Study:

    • To develop a rapid and efficient method for patterning LC alignment.
    • To create switchable Pancharatnam-Berry phase microlens arrays.
    • To evaluate the performance and applicability of the developed technique.

    Main Methods:

    • Utilized a rapid nano-imprinting technique.
    • Fabricated a single-side aligned cell for the microlens array.
    • Investigated the focusing and imaging properties of the fabricated microlenses.

    Main Results:

    • Successfully patterned LC alignment for PB microlens arrays.
    • Demonstrated a switchable microlens array with fast response time.
    • Achieved low operation voltage for the microlens array.
    • Confirmed good focusing and imaging capabilities.
    • Showed potential for patterning on curvilinear surfaces.

    Conclusions:

    • The rapid nano-imprinting technique is highly effective for patterning LC alignment in PB microlens arrays.
    • The developed switchable microlens array exhibits excellent performance characteristics.
    • This method offers a promising approach for fabricating advanced LC-based optical components, including those on non-planar substrates.