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    Area of Science:

    • Optics
    • Photonics
    • Materials Science

    Background:

    • Chiral particles require precise separation methods for various applications.
    • Existing optical sorting techniques have limitations in sensitivity and control.

    Purpose of the Study:

    • To develop a novel all-optical method for enantioselection and sorting of chiral microspheres.
    • To enable fine-tuning of chiral resolution through external control of light sources.

    Main Methods:

    • Utilizing optical pulling forces from two non-collinear, circularly polarized light sources.
    • Controlling enantioselectivity by adjusting the angle between incident light wavevectors.
    • Sorting single multipolar chiral microspheres based on their handedness.

    Main Results:

    • Achieved simultaneous all-optical enantioselection and sorting of chiral microspheres.
    • Demonstrated external control over the range of chiral indices for enantioselection.
    • Successfully sorted particles with arbitrarily small chiral parameters, surpassing current optical methods.

    Conclusions:

    • The proposed twofold scheme offers a highly controllable and sensitive method for chiral particle sorting.
    • This all-optical approach advances the capabilities for manipulating and separating chiral matter.
    • The technique holds potential for applications in fields requiring precise chiral analysis and manipulation.