Mapping the sensitivity of split ring resonators using a localized analyte

Graham J. Sharpe; Henrique Vilhena; Basudev Lahiri; Scott McMeekin; Richard M. De La Rue; Nigel P. Johnson

doi:10.1063/1.4954797

Mapping the sensitivity of split ring resonators using a localized analyte

Graham J. Sharpe, Henrique Vilhena, Basudev Lahiri, Scott McMeekin, Richard M. De La Rue, Nigel P. Johnson

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Abstract

Split ring resonator (SRR) based metamaterials have frequently been demonstrated for use as optical sensors of organic materials. This is made possible by matching the wavelength of the SRR plasmonic resonance with a molecular resonance of a specific analyte, which is usually placed on top of the metal structure. However, systematic studies of SRRs that identify the regions that exhibit a high electric field strength are commonly performed using simulations. In this paper we demonstrate that areas of high electric field strength, termed “hot-spots,” can be found by localizing a small quantity of organic analyte at various positions on or near the structure. Furthermore, the sensitivity of the SRR to the localized analyte can be quantified to determine, experimentally, suitable regions for optical sensing.

Original language	English
Article number	251105
Journal	Applied Physics Letters
Volume	108
Issue number	25
Early online date	23 Jun 2016
DOIs	https://doi.org/10.1063/1.4954797
Publication status	Published - Jun 2016

Keywords

split ring resonators
optical sensors
localized analyte

Documents and Links

10.1063/1.4954797

Sharp, G.J. et al (2016) Mapping the sensitivity of split ring resonators using a localized analyte
Copyright 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). [http://dx.doi.org/10.1063/1.4954797]
Final published version, 1.34 MBLicence: CC BY

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Sharpe, G. J., Vilhena, H., Lahiri, B., McMeekin, S., De La Rue, R. M., & Johnson, N. P. (2016). Mapping the sensitivity of split ring resonators using a localized analyte. Applied Physics Letters, 108(25), [251105]. https://doi.org/10.1063/1.4954797

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abstract = "Split ring resonator (SRR) based metamaterials have frequently been demonstrated for use as optical sensors of organic materials. This is made possible by matching the wavelength of the SRR plasmonic resonance with a molecular resonance of a specific analyte, which is usually placed on top of the metal structure. However, systematic studies of SRRs that identify the regions that exhibit a high electric field strength are commonly performed using simulations. In this paper we demonstrate that areas of high electric field strength, termed “hot-spots,” can be found by localizing a small quantity of organic analyte at various positions on or near the structure. Furthermore, the sensitivity of the SRR to the localized analyte can be quantified to determine, experimentally, suitable regions for optical sensing.",

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AU - De La Rue, Richard M.

AU - Johnson, Nigel P.

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