Resonant excitation of volume and surface fields on complex electrodynamic surfaces

MacLachlan, A. J. and Robertson, C. W. and Konoplev, I. V. and Cross, A. W. and Phelps, A. D. R. and Ronald, K. (2019) Resonant excitation of volume and surface fields on complex electrodynamic surfaces. Physical Review Applied, 11 (3). 034034. ISSN 2331-7043 (https://doi.org/10.1103/PhysRevApplied.11.034034)

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Abstract

Analytical, numerical, and experimental studies of volume and surface-field coupling in planar metal periodic surface lattice (PSL) structures superimposed on dielectric substrates with a metallic backing (PSLDM) are presented. We show the formation of frequency-locked PSLDM-coupled eigenmodes and unlocked surface-field resonances (PSL without substrate). These experimental observations are in excellent agreement with theoretical and numerical predictions. For the first time, the derivation of a field coupling coefficient α is demonstrated. By comparing theoretical and numerical dispersions, we obtain α. Detailed analysis of possible scattering mechanisms and dispersive behavior in subwavelength "effective metadielectric" PSLs is shown. The theory and measurements presented in this paper are applicable over a broad frequency range from optical frequencies to THz and are fundamental to the innovation of high-power short-wavelength sources, solar cells, and alternative subwavelength absorbers.

  • Item type:Article
    ID code:67218
    Dates:
    Date
    Event
    14 March 2019
    Published
    12 February 2019
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:07 Mar 2019 16:29
    Last modified:21 Apr 2024 11:53
    URI:https://strathprints.strath.ac.uk/id/eprint/67218
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