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    |October 15, 2020
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    This study introduces a multiwavelength achromatic super-oscillatory metasurface (ASOM) that overcomes wavelength sensitivity. This innovation enables super-resolution imaging across multiple wavelengths, enhancing optical applications.

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    Area of Science:

    • Optics and Photonics
    • Metamaterials
    • Super-resolution Imaging

    Background:

    • Super-oscillatory lenses use micro/nano structures for wavefront shaping and super-resolution.
    • Wavelength sensitivity of traditional super-oscillatory foci limits their practical application.

    Purpose of the Study:

    • To propose a multiwavelength achromatic super-oscillatory metasurface (ASOM).
    • To achieve simultaneous control of distinct wavelength-dependent wavefronts.
    • To overcome the limitations of wavelength sensitivity in super-oscillatory optics.

    Main Methods:

    • Design and numerical verification of a multiwavelength ASOM.
    • Simultaneous control of wavefronts for different wavelengths.
    • Analysis of foci formation and resolution capabilities.

    Main Results:

    • Precisely formed foci at the same axial plane for designed wavelengths.
    • Achieved super-resolution imaging beyond the diffraction limit.
    • Demonstrated wavelength-independent performance of the ASOM.

    Conclusions:

    • The proposed multiwavelength ASOM offers precise control over light wavefronts.
    • This method provides greater design freedom for planar optical components.
    • Potential applications include data storage, super-resolution imaging, and holography.