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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Grid composite meta-surface absorber with thermal isolation structure for terahertz detection.

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    |January 4, 2024
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    This study presents a novel meta-surface absorber with over 80% absorptance at 210 GHz, ideal for detector applications. Fabricated using cost-effective printed circuit board technology, it offers stable, polarization-insensitive performance.

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    Area of Science:

    • Electromagnetics and Metamaterials
    • Microwave Engineering
    • Detector Technology

    Background:

    • The absorber is a critical component influencing detector response performance.
    • Meta-surface absorbers offer tunable electromagnetic properties.
    • Printed circuit board (PCB) technology enables cost-effective fabrication.

    Purpose of the Study:

    • To design and fabricate a meta-surface absorber with high absorptance and broad operating frequency.
    • To ensure stable and polarization-insensitive performance for detector compatibility.
    • To validate performance through simulation and experimental testing.

    Main Methods:

    • Combining two resonant structures to create a meta-surface absorber.
    • Utilizing FR-4 as a dielectric layer compatible with PCB fabrication.
    • Implementing symmetric design for absorbing units and array layout.
    • Incorporating thermal insulation gaps for enhanced thermal management.

    Main Results:

    • Achieved over 80% absorptance around 210 GHz with a broad operating frequency range.
    • Demonstrated stable absorptance performance across different incident polarization angles.
    • Experimental results closely matched simulation predictions, confirming excellent performance.

    Conclusions:

    • The developed meta-surface absorber is suitable for detector applications due to its high absorptance and polarization-insensitive characteristics.
    • PCB fabrication ensures reduced cost and fabrication time.
    • The absorber's design provides reliable performance and thermal insulation.