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Kerker-type positional disorder immune metasurfaces.

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    Summary
    This summary is machine-generated.

    We developed robust Kerker-type metasurfaces immune to positional disorder for optical devices. These disordered metasurfaces maintain performance, unlike non-Kerker types, enabling practical applications.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Nanotechnology

    Background:

    • Metasurfaces offer advanced optical functionalities but are sensitive to fabrication imperfections.
    • Strict periodicity of meta-atoms is typically required for predictable metasurface performance.
    • Developing disorder-immune metasurfaces is crucial for practical micro-nano optical devices.

    Purpose of the Study:

    • To propose and investigate Kerker-type metasurfaces with inherent immunity to positional disorder.
    • To demonstrate that these metasurfaces maintain high performance despite significant positional perturbations.
    • To explore the underlying physics enabling disorder immunity in metasurfaces.

    Main Methods:

    • Design of two types of core-shell cylinder metasurfaces satisfying first and second Kerker conditions.
    • Numerical simulations to analyze metasurface performance under significant positional disorder.
    • Comparison of scattering properties between Kerker-type and non-Kerker-type metasurfaces.

    Main Results:

    • Kerker-type metasurfaces exhibited remarkable robustness against positional disorder, maintaining excellent transmission and magnetic mirror responses.
    • Positional disorder significantly degraded the performance of non-Kerker-type metasurfaces.
    • Unidirectional scattering from individual meta-atoms minimized lateral coupling, preserving overall metasurface functionality.

    Conclusions:

    • The proposed Kerker-type metasurfaces provide a viable strategy for fabricating robust optical micro-nano devices.
    • This disorder immunity opens new avenues for metasurface applications in complex environments like sensing and communications.
    • The findings advance the design principles for practical and resilient metasurface technologies.