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

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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.
LanguageEnglish
Article number613
Number of pages8
JournalSN Applied Sciences
Volume1
Issue number6
Early online date21 May 2019
DOIs
Publication statusPublished - 30 Jun 2019

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coupled modes
copper
tunable filters
backups
periodic variations
absorbers
antennas
solar cells
plots
bandwidth
microwaves

Keywords

  • mm-wave sources
  • surface modes
  • inductive coupling
  • periodic structures
  • terahertz
  • metamaterials

Cite this

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title = "Mode coupling in periodic surface lattice and metamaterial structures for mm-wave and THz applications",
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.",
keywords = "mm-wave sources, surface modes, inductive coupling, periodic structures, terahertz, metamaterials",
author = "MacLachlan, {A. J.} and Robertson, {C. W.} and K. Ronald and Cross, {A. W.} and Phelps, {A. D. R.}",
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T1 - Mode coupling in periodic surface lattice and metamaterial structures for mm-wave and THz applications

AU - MacLachlan, A. J.

AU - Robertson, C. W.

AU - Ronald, K.

AU - Cross, A. W.

AU - Phelps, A. D. R.

PY - 2019/6/30

Y1 - 2019/6/30

N2 - 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.

AB - 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.

KW - mm-wave sources

KW - surface modes

KW - inductive coupling

KW - periodic structures

KW - terahertz

KW - metamaterials

UR - https://link.springer.com/journal/volumesAndIssues/42452

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