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High-resolution terahertz coded-aperture imaging for near-field three-dimensional target.

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    We present a novel high-resolution terahertz imaging technique using a coded aperture for fast beam scanning. This method enables detailed 3D imaging of near-field targets with enhanced precision.

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    Area of Science:

    • Optics and Photonics
    • Electromagnetism
    • Imaging Science

    Background:

    • Terahertz (THz) imaging offers unique capabilities for non-destructive testing and security screening.
    • Achieving high-resolution and fast 3D imaging in the terahertz domain, especially for near-field targets, remains a challenge.
    • Current methods often face limitations in speed, resolution, or complexity.

    Purpose of the Study:

    • To introduce a novel high-resolution terahertz imaging method.
    • To enable fast beam scanning for near-field three-dimensional targets.
    • To demonstrate the feasibility of the proposed imaging technique.

    Main Methods:

    • Utilizing a coded aperture to modulate incident terahertz waves.
    • Implementing a step-by-step scanning of the imaging space with a driven terahertz beam.
    • Performing theoretical analyses based on physical optics.
    • Conducting simulation experiments to validate the method.

    Main Results:

    • Demonstrated a high-resolution terahertz imaging capability.
    • Achieved fast beam scanning for 3D near-field targets.
    • Validated the proposed method through theoretical analysis and simulations.

    Conclusions:

    • The proposed terahertz coded-aperture imaging method is feasible for high-resolution 3D near-field imaging.
    • Fast beam scanning is effectively achieved, improving imaging efficiency.
    • This technique offers a promising advancement in terahertz imaging applications.