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    This study introduces an efficient immersed interface method for analyzing dielectric chiral optical fibers. The method accurately computes various optical fiber modes, including guided, leaky, and surface modes.

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    Area of Science:

    • Optics and Photonics
    • Computational Electromagnetics
    • Materials Science

    Background:

    • Modal analysis is crucial for understanding light propagation in optical fibers.
    • Chiral optical fibers exhibit unique electromagnetic properties due to their structure.
    • Efficient numerical methods are needed for complex fiber geometries.

    Purpose of the Study:

    • To develop and validate an efficient immersed interface method for modal analysis of dielectric chiral optical fibers.
    • To apply the method for computing guided, leaky, and surface modes.
    • To demonstrate the method's applicability to arbitrary electromagnetic parameter profiles.

    Main Methods:

    • Application of the immersed interface method within a finite-difference framework.
    • Development of second- and fourth-order accuracy formulations.
    • Numerical computation of various modes in dielectric chiral fibers.

    Main Results:

    • The developed formulations accurately compute guided, leaky, and surface modes.
    • The method is effective for dielectric chiral step-profile and Bragg fibers.
    • The approach is applicable to arbitrary, piecewise constant electromagnetic parameter profiles.

    Conclusions:

    • The immersed interface method provides an efficient and accurate approach for modal analysis of dielectric chiral optical fibers.
    • The developed finite-difference formulations are versatile for different mode types and fiber profiles.
    • This work contributes to the understanding and design of advanced optical fiber structures.