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Related Experiment Video

Updated: May 6, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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All optical two-dimensional spatial integration using a slab waveguide.

Hadi Mohammadi, Mahmood Akbari

    Optics Express
    |September 23, 2025
    PubMed
    Summary

    This study presents practical hexahedral slab waveguide structures for optical integration, utilizing the Brewster effect to overcome limitations of previous designs and enable two-dimensional integration.

    Area of Science:

    • Optics and Photonics
    • Integrated Optics
    • Waveguide Devices

    Background:

    • Previous one-dimensional (1D) optical integrators using slab waveguides required impractical semi-infinite silicon layers.
    • These integrators were limited to either p- or s-polarized light beams.

    Purpose of the Study:

    • To propose practical hexahedral slab waveguide structures for 1D optical integration.
    • To address the limitations of existing designs by eliminating the need for semi-infinite silicon layers.
    • To demonstrate the feasibility of achieving two-dimensional (2D) optical integration.

    Main Methods:

    • Exploiting the Brewster effect with finite slanted-interface silicon layers to replace semi-infinite layers.
    • Analyzing the impact of applying the Brewster effect in substrate versus cover regions.

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  • Cascading s-polarized and p-polarized integrators for 2D integration.

    • Main Results:

    • Introduced two practical hexahedral slab waveguide structures for 1D optical integration.
    • Demonstrated that applying the Brewster effect in the cover region mitigates magnification issues observed when applied in the substrate.
    • Analytically showed that cascading s- and p-polarized integrators enables 2D spatial integration.

    Conclusions:

    • The proposed hexahedral structures offer a practical solution for slab waveguide optical integrators.
    • The Brewster effect is effectively utilized to create more feasible device designs.
    • A novel hexahedral slab waveguide structure capable of performing 2D spatial integration is proposed.