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Related Experiment Video

Updated: May 7, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Low-loss terahertz waveguide Bragg grating using a two-wire waveguide and a paper grating.

Guofeng Yan, Andrey Markov, Yasser Chinifooroshan

    Optics Letters
    |October 10, 2013
    PubMed
    Summary
    This summary is machine-generated.

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    We developed a low-loss terahertz waveguide Bragg grating (TWBG) using a plasmonic two-wire waveguide and paper grating for terahertz communications. This device demonstrates efficient performance with low insertion loss across a wide frequency range.

    Area of Science:

    • Terahertz (THz) photonics and communications
    • Plasmonics and metamaterials
    • Waveguide devices

    Background:

    • Terahertz (THz) technology requires efficient waveguide components for signal manipulation.
    • Plasmonic waveguides offer potential for miniaturization and high performance in the THz range.
    • Bragg gratings are crucial for spectral control in optical and THz systems.

    Purpose of the Study:

    • To propose and demonstrate a novel low-loss terahertz waveguide Bragg grating (TWBG).
    • To investigate the performance of TWBGs fabricated with plasmonic two-wire waveguides and micromachined paper gratings.
    • To confirm the suitability of TWBGs for terahertz communications applications.

    Main Methods:

    • Fabrication of two TWBGs with varying periods and lengths using a plasmonic two-wire waveguide and paper grating.

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  • Experimental measurement of transmission spectra, stop band loss, and insertion loss across the 0.1–0.7 THz range.
  • Numerical analysis of TWBG modal dispersion relations, modal loss, and field distributions.

    • Main Results:

    • TWBGs exhibited stop band losses of 16 dB and 14 dB at 0.637 THz and 0.369 THz, respectively.
    • Measured Q factors were 142 and 105 for the fabricated TWBGs.
    • Low insertion loss (1–4 dB) was observed across the entire 0.1–0.7 THz spectrum.

    Conclusions:

    • The proposed TWBG design utilizing plasmonic two-wire waveguides and paper gratings achieves low-loss operation.
    • Numerical simulations confirmed the low-loss and high-coupling-efficiency characteristics of the TWBGs.
    • These results indicate the significant potential of TWBGs for future terahertz communication systems.