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    Area of Science:

    • Optics and Photonics
    • Beam Propagation
    • Nonlinear Optics

    Background:

    • Airy beams are known for their self-healing and non-diffracting properties.
    • Autofocusing beams concentrate light rapidly in space.
    • Current autofocusing beams have limitations in focal control and number of foci.

    Purpose of the Study:

    • To propose and characterize a novel multifocus autofocusing Airy beam (MAAB).
    • To investigate the autofocusing properties and focal characteristics of the MAAB.
    • To explore potential applications stemming from the MAAB's unique optical behavior.

    Main Methods:

    • Modification of a symmetric Airy beam (SAB) frequency spectrum using a Gaussian band elimination filter.
    • Theoretical analysis of beam propagation and focal plane characteristics.
    • Experimental verification of the MAAB's autofocusing and multifocal properties.

    Main Results:

    • The MAAB exhibits four off-axis foci at its autofocusing plane.
    • MAAB demonstrates enhanced abrupt autofocusing compared to the original SAB.
    • The focal position of the second peak remains stable, while the first peak's position shifts with intensity.

    Conclusions:

    • The MAAB presents a unique multifocus autofocusing capability.
    • Its distinct focal dynamics offer advantages over conventional autofocusing beams.
    • The MAAB holds potential for applications in optical trapping, microscopy, and laser material processing.