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Updated: May 29, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
Multi-modal transmission of microwaves through hole arrays
James D Edmunds1, Euan Hendry, Alastair P Hibbins
1Electromagnetic Materials Group, School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK. j.d.edmunds@ex.ac.uk
Abstract:
The microwave transmission through hole arrays in thick metal plates for both large holes (cut-off below onset of diffraction) and small holes (cut-off above onset of diffraction) have been compared through both experiment and modelling. Enhanced transmission is in part mediated by the excitation of diffractively coupled surface waves. Large holes, with cut-off below the onset of diffraction (due to the hole periodicity), are able to support multiple modes in transmission when the depth of the holes is sufficient to support quantisation in the propagation direction. Small holes, with cut-off above the onset of diffraction however only support two coupled surface modes (symmetric and anti-symmetric) below diffraction.
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