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Multiband metamaterial selective absorber for infrared stealth.

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    This study introduces a novel metamaterial selective absorber for infrared stealth applications. The nanostructured device significantly reduces detected infrared signals across various wavelengths and temperatures.

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    Area of Science:

    • Materials Science
    • Optics
    • Nanotechnology

    Background:

    • Selective absorbers are crucial for applications like thermophotovoltaics and radiative cooling.
    • Infrared stealth technology aims to reduce the detectability of objects in the infrared spectrum.

    Purpose of the Study:

    • To propose and analyze a metamaterial selective absorber for infrared stealth.
    • To achieve multiband absorption tailored for specific infrared and atmospheric bands.
    • To investigate the angular dependence and temperature stability of the absorber's performance.

    Main Methods:

    • Fabrication of a metal-insulator-metal nanostructured selective absorber.
    • Spectroscopic analysis to determine absorption characteristics.
    • Simulation and experimental validation of spectral response and angular dependence.

    Main Results:

    • The proposed absorber exhibits multiband absorption with a sharp peak at 1.54 µm and broader peaks at 2.83 µm and 6.11 µm.
    • Achieved up to 90% reduction in detected infrared signals.
    • Demonstrated suppression of infrared signatures across a wide temperature range and varying incident angles.

    Conclusions:

    • The metamaterial selective absorber is effective for infrared stealth, particularly against laser-guided systems.
    • The design successfully matches atmospheric absorption bands, enhancing stealth capabilities.
    • The structure maintains high thermal emission while reducing infrared signatures.