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Light-trapping by wave interference in intermediate-thickness silicon solar cells: reply.

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    This study addresses inaccuracies in a comment regarding photonic crystal light trapping calculations. We clarify numerical methods and experimental data, confirming minimal light absorption at convergence.

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    Area of Science:

    • Optics and Photonics
    • Computational Physics

    Background:

    • A recent comment misrepresented numerical calculations and experimental measurements of light trapping in photonic crystals.
    • Discrepancies were noted regarding the intensity of trapped light and absorption levels.

    Purpose of the Study:

    • To refute incorrect assertions and speculations presented in a comment regarding our published work.
    • To clarify numerical FDTD (Finite-Difference Time-Domain) calculations and experimental measurements.
    • To correct a typographical error in the original manuscript.

    Main Methods:

    • Direct comparison of COMSOL FEM (Finite Element Method) and FDTD calculations.
    • Analysis of numerical FDTD convergence plateau.
    • Evaluation of experimental EQE (External Quantum Efficiency) and absorbance data.

    Main Results:

    • Confirmed that only very low relative intensities of trapped light remain in the photonic crystal at numerical FDTD convergence.
    • Quantified the extent of MAPD (Maximum Absolute Percentage Difference) overestimation between 1100 nm and 1200 nm.
    • Identified sources of variance between experimental and calculated optical properties.

    Conclusions:

    • The comment's assertions regarding light absorption and numerical accuracy were largely unfounded.
    • Our numerical and experimental results are consistent, indicating minimal light absorption under the specified conditions.
    • Clarifications provided resolve discrepancies and correct minor errors.