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THz Bragg structures fabricated with additive manufacturing.

C Harrison Brodie, Isaac Spotts, Christopher M Collier

    Applied Optics
    |September 14, 2023
    PubMed
    Summary
    This summary is machine-generated.

    3D printed Terahertz (THz) Bragg structures offer tunable frequency filtering for advanced THz applications. This fabrication method simplifies creating specialized THz photonic elements for science and technology.

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    Area of Science:

    • Terahertz (THz) science and technology
    • Photonic devices
    • Additive manufacturing

    Background:

    • Advancing THz science necessitates specialized photonic elements with tailored absorption and refractive properties.
    • Additive manufacturing, particularly 3D printing, offers a simplified approach to fabricating complex THz photonic structures.
    • Periodic Bragg structures are key THz photonic elements for selective frequency filtering.

    Purpose of the Study:

    • To present a THz Bragg structure fabricated using 3D printing.
    • To characterize the material properties and investigate the theoretical operation of the 3D printed THz Bragg structure.
    • To experimentally validate the performance of the 3D printed THz Bragg structure for tunable frequency filtering.

    Main Methods:

    • Fabrication of a THz Bragg structure using fused filament fabrication (3D printing) with high-impact polystyrene.
    • Characterization of the polystyrene material using Terahertz time-domain spectroscopy (THz-TDS).
    • Electromagnetic simulations using finite-difference time-domain (FDTD) methods to model the structure's geometry and operation.
    • Experimental evaluation of the fabricated THz Bragg structure using a dedicated THz test bed.

    Main Results:

    • Successful fabrication of a 3D printed THz Bragg structure from high-impact polystyrene.
    • Characterization of the polystyrene's THz-regime optical properties.
    • Demonstration of tunable frequency filtering capabilities through agreement between FDTD simulations and experimental results.
    • Validation of the 3D printing approach for creating functional THz photonic elements.

    Conclusions:

    • 3D printing provides an accessible and effective method for fabricating THz Bragg structures.
    • The presented THz Bragg structure exhibits tunable frequency filtering, validated by simulation and experiment.
    • This work advances the development of specialized THz photonic elements, paving the way for broader THz technology applications.