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Broadband MoS2-based absorber investigated by a generalized interference theory.

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    This study introduces a broadband absorber using monolayer molybdenum disulfide (MoS2), achieving over 90% absorption in the visible spectrum. The developed generalized interference theory (GIT) facilitates the design and analysis of such advanced optical devices.

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    Area of Science:

    • Optoelectronics
    • Materials Science
    • Nanotechnology

    Background:

    • Monolayer molybdenum disulfide (MoS2) exhibits unique optical properties suitable for advanced photonic applications.
    • Efficient broadband absorbers are crucial for various optoelectronic devices, including solar cells and photodetectors.
    • Existing absorber designs often face limitations in bandwidth, angular stability, or material compatibility.

    Purpose of the Study:

    • To propose and investigate a broadband absorber based on monolayer molybdenum disulfide (MoS2).
    • To derive a generalized interference theory (GIT) for analyzing multilayer optical absorbers.
    • To demonstrate the absorber's performance and potential applications in photoelectric storage and detection.

    Main Methods:

    • Utilized hybrid Lorentz-Drude and Gaussian models for monolayer MoS2 optical properties.
    • Employed dyadic Green's functions to analyze light propagation in the MoS2 structure.
    • Derived and applied generalized interference theory (GIT) for numerical absorption calculations.
    • Simulated the sandwich-like MoS2 absorber design using commercial electromagnetic software.

    Main Results:

    • Achieved absorption ≥ 90% over a broad wavelength range (389–517 nm).
    • Demonstrated excellent angular stability, with effective operation up to 60° angle of incidence.
    • Validated the absorber's performance and the derived GIT through electromagnetic simulations.

    Conclusions:

    • The proposed MoS2-based absorber offers high absorption and broadband operation in the visible regime.
    • The derived GIT provides a powerful tool for designing and analyzing complex multilayer optical structures.
    • The developed absorber shows promise for applications in photoelectric storage and detection.