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    We demonstrate near-total light energy transfer into gap solitons using coherent perfect absorption in nonlinear periodic structures. This results in null scattering and the emergence of nonlinear super-scattering states.

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    Area of Science:

    • Nonlinear optics
    • Condensed matter physics
    • Photonics

    Background:

    • Periodic structures with alternating nonlinear and linear layers exhibit unique optical properties.
    • Coherent perfect absorption (CPA) enables complete absorption of incident light.
    • Gap solitons are localized nonlinear optical waves formed in photonic bandgaps.

    Purpose of the Study:

    • To investigate the excitation of gap solitons under CPA conditions.
    • To analyze light energy transfer and scattering phenomena in nonlinear periodic systems.
    • To explore the formation of nonlinear super-scattering states.

    Main Methods:

    • Theoretical modeling of a symmetric periodic structure with Kerr nonlinear and linear layers.
    • Simulations employing coherent illumination from both ends.
    • Application of nonlinear characteristic matrix methods for analysis.

    Main Results:

    • Achieved near-total transfer of incident light energy into gap solitons.
    • Observed null scattering, indicating complete energy localization.
    • Identified and characterized nonlinear super-scattering states.

    Conclusions:

    • Coherent perfect absorption is an effective mechanism for exciting gap solitons.
    • Nonlinear periodic structures can achieve efficient light energy harvesting.
    • The findings open avenues for novel photonic devices and light manipulation strategies.