Mode coupling in periodic surface lattice and metamaterial structures for mm-wave and THz applications

MacLachlan, A. J. and Robertson, C. W. and Ronald, K. and Cross, A. W. and Phelps, A. D. R. (2019) Mode coupling in periodic surface lattice and metamaterial structures for mm-wave and THz applications. SN Applied Sciences, 1 (6). 613. ISSN 2523-3971 (https://doi.org/10.1007/s42452-019-0596-z)

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Abstract

Planar Periodic Surface Lattice (PSL) structures based on thin, subwavelength substrates have been studied experimentally and numerically. Coupled eigenmode resonances composed of partial volume and surface modes are observed for PSLs with lattice periodicities of 1.50 mm and 1.62 mm etched onto thin copper-backed, substrates. We show that the copper backing is essential for mode-selection in a multi-moded structure and demonstrate good agreement between the experimental results and coupled dispersion plots calculated using CST Microwave Studio. For the first time, evidence of a coupled eigenmode in a metadielectric PSL is presented. It is shown that metadielectric PSLs can support coupled resonances over a narrow bandwidth and are relevant to the innovation of tunable filters, absorbers and sources. Concepts discussed in this work are valid across the frequency spectrum from optical to THz and mm-wave frequencies and are fundamental to the innovation of novel mm-wave-THz sources as well as highly efficient solar cells, diagnostic instruments and antennae.

  • Item type:Article
    ID code:67781
    Dates:
    Date
    Event
    30 June 2019
    Published
    21 May 2019
    Published Online
    10 May 2019
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:14 May 2019 08:54
    Last modified:09 Apr 2024 00:41
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/67781
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