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    Area of Science:

    • Nanophotonics and Plasmonics
    • Computational Electromagnetics
    • Materials Science

    Background:

    • Accurate modeling of curved plasmonic interfaces is crucial for designing advanced optical metamaterials.
    • Existing numerical methods face challenges in efficiently simulating these complex geometries.

    Purpose of the Study:

    • To develop a modified Finite-Difference Time-Domain (FDTD) formulation for precise simulation of curved plasmonic interfaces.
    • To enable the accurate design and analysis of nanophotonic structures with curved elements.

    Main Methods:

    • Utilized a standard rectangular FDTD mesh combined with tensor effective permittivities for interface cells.
    • Implicitly enforced field boundary conditions for curved surfaces.
    • Applied the method to thin curved dispersive layers.

    Main Results:

    • Demonstrated accurate modeling of curved plasmonic interfaces.
    • Successfully performed periodic analysis of a silver nanorod array.
    • Computed scattering parameters for a thin dispersive ring in a waveguide.

    Conclusions:

    • The modified FDTD technique provides an effective and accurate approach for simulating curved plasmonic structures.
    • This method facilitates the design of novel optical metamaterials and nanophotonic devices.