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    Researchers developed a method to create transversely oriented cylindrically polarized optical fields. This new technique generates controllable transverse spin and orbital angular momentum for advanced optical applications.

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    Area of Science:

    • Optics and Photonics
    • Electromagnetism

    Background:

    • Cylindrical vector (CV) beams possess unique polarization patterns with an optical axis singularity.
    • Existing methods primarily focus on axial singularity lines.

    Purpose of the Study:

    • To propose and demonstrate a method for synthesizing transversely oriented cylindrically polarized optical fields.
    • To achieve a singularity line perpendicular to the optical axis in the focal region.

    Main Methods:

    • Utilizing the time-reversal method.
    • Applying vectorial diffraction theory.
    • Employing a 4Pi optical configuration.

    Main Results:

    • Successfully demonstrated transversely oriented radially and azimuthally polarized optical fields.
    • Achieved optical fields with singularity lines perpendicular to the optical axis.
    • Showcased the generation of controllable transverse spin angular momentum (SAM) and transverse orbital angular momentum (OAM).

    Conclusions:

    • The proposed method enables the synthesis of novel transversely oriented cylindrically polarized optical fields.
    • The generated fields offer controllable transverse SAM and OAM.
    • Potential applications include optical tweezing, light-matter interactions, and unidirectional beam excitation.