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Related Experiment Video

Updated: Dec 25, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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Coupled edge modes supported by a microwave metasurface.

J D de Pineda, A P Hibbins, J R Sambles

    Optics Letters
    |April 3, 2020
    PubMed
    Summary

    Researchers explored edge modes in microwave metasurfaces, demonstrating their coupling across gaps. This phenomenon, previously observed at optical frequencies, is now verified at microwave frequencies for the first time.

    Area of Science:

    • Metamaterials and Plasmonics
    • Electromagnetics and Wave Phenomena

    Background:

    • Metasurfaces with circular patches in hexagonal arrays exhibit edge modes analogous to edge plasmons.
    • Edge mode coupling is a known phenomenon at optical frequencies.

    Purpose of the Study:

    • To investigate the coupling of edge modes between two adjacent microwave metasurface arrays.
    • To demonstrate the occurrence of edge mode coupling at microwave frequencies.

    Main Methods:

    • Fabrication of overlapping layers of circular patches arranged in a hexagonal array to form microwave metasurfaces.
    • Experimental exploration of edge mode behavior and coupling across small gaps between metasurface arrays.

    Main Results:

    • Confirmation that microwave metasurfaces support edge modes similar to edge plasmons.

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  • Successful demonstration and verification of edge mode coupling across small gaps at microwave frequencies.

    • Conclusions:

    • The study validates the existence and coupling of edge modes in microwave metasurfaces.
    • This work extends the understanding of edge mode coupling from optical to microwave frequencies, opening new avenues for device applications.