Park, S orcid.org/0000-0001-8606-191X and Cunningham, J orcid.org/0000-0002-1805-9743 (2020) Determination of Permittivity of Dielectric Analytes in the Terahertz Frequency Range Using Split Ring Resonator Elements Integrated with On-Chip Waveguide. Sensors, 20 (15). 4264. ISSN 1424-8220
Abstract
We investigate the use of finite-element simulations as a novel method for determining the dielectric property of target materials in the terahertz (THz) frequency range using split-ring resonator (SRR) sensing elements integrated into a planar Goubau line (PGL) waveguide. Five such SRRs were designed to support resonances at specific target frequencies. The origin of resonance modes was identified by investigating the electric field distribution and surface current modes in each SRR. Red-shifts were found in the resonances upon deposition of overlaid test dielectric layers that saturated for thicknesses above 10 µm. We also confirmed that the SRRs can work as independent sensors by depositing the analyte onto each individually. The relation between the permittivity of the target material and the saturated resonant frequency was obtained in each case, and was used to extract the permittivity of a test dielectric layer at six different frequencies in the range of 200–700 GHz as an example application. Our approach enables the permittivity of small volumes of analytes to be determined at a series of discrete frequencies up to ~1 THz.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Permittivity measurement; metamaterials; split-ring resonator; on-chip waveguide |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/R00501X/1 EPSRC (Engineering and Physical Sciences Research Council) EP/P021859/1 EPSRC (Engineering and Physical Sciences Research Council) EP/K503836/1 EPSRC (Engineering and Physical Sciences Research Council) GR/S51424/01 EPSRC (Engineering and Physical Sciences Research Council) GR/S51417/01 Agilent Technologies Foundation N/A EPSRC (Engineering and Physical Sciences Research Council) EP/H007881/1 EPSRC (Engineering and Physical Sciences Research Council) EP/M01598X/1 EPSRC (Engineering and Physical Sciences Research Council) EP/M028143/1 EPSRC (Engineering and Physical Sciences Research Council) EP/F029543/1 Leverhulme Trust F/00 122/AM EPSRC (Engineering and Physical Sciences Research Council) EP/M00306X/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Jul 2020 13:18 |
Last Modified: | 02 Jan 2025 13:06 |
Status: | Published |
Publisher: | MDPI |
Identification Number: | 10.3390/s20154264 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:163810 |