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    Area of Science:

    • Computational electromagnetics
    • Diffractive optics
    • Numerical methods

    Background:

    • Analyzing large diffractive optical elements (DOEs) presents computational challenges.
    • Conventional field stitching (FS) methods require significant overlap between divided sections, leading to inefficiency.

    Purpose of the Study:

    • To introduce a more efficient field-stitching boundary element method (FSBEM) for diffraction analyses of large DOEs.
    • To address the computational resource limitations of existing FS methods.

    Main Methods:

    • The proposed FSBEM divides the DOE spatially and computes electromagnetic fields for component parts (reflected, difference, stitching fields).
    • This approach aims for rapid convergence of the solution.

    Main Results:

    • The FSBEM was validated by computing a one-dimensional DOE and assessing its convergence.
    • Performance was compared against the conventional FS method.

    Conclusions:

    • The FSBEM offers advantages over conventional FS methods for large DOE diffraction analysis.
    • The method demonstrates improved efficiency and convergence properties.