Mid-infrared optical sensing using sub-wavelength gratings

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dc.contributor.author Hogan, Brian
dc.contributor.author Lewis, Liam
dc.contributor.author McAuliffe, Michael
dc.contributor.author Hegarty, Stephen P.
dc.date.accessioned 2019-11-20T06:03:22Z
dc.date.available 2019-11-20T06:03:22Z
dc.date.issued 2019-02-04
dc.identifier.citation Hogan, B., Lewis, L., McAuliffe, M. and Hegarty, S.P., 2019. Mid-infrared optical sensing using sub-wavelength gratings. Optics express, 27(3), (10pp). DOI:10.1364/OE.27.003169 en
dc.identifier.volume 27 en
dc.identifier.issued 3 en
dc.identifier.startpage 3169 en
dc.identifier.endpage 3179 en
dc.identifier.uri http://hdl.handle.net/10468/9150
dc.identifier.doi 10.1364/OE.27.003169 en
dc.description.abstract Optical sensing has shown great potential for both quantitative and qualitative analysis of compounds. In particular sensors which are capable of detecting changes in refractive index at a surface as well as in bulk material have received much attention. Much of the recent research has focused on developing technologies that enable such sensors to be deployed in an integrated photonic device. In this work we demonstrate experimentally, using a sub-wavelength grating the detection of ethanol in aqueous solution by interrogating its large absorption band at 9.54 μm. Theoretical investigation of the operating principle of our grating sensor shows that in general, as the total field interacting with the analyte is increased, the corresponding absorption is also increased. We also theoretically demonstrate how sub-wavelength gratings can detect changes in the real part of the refractive index, similar to conventional refractive index (RI) sensors. en
dc.description.sponsorship Cork Institute of Technology (RISAM); Irish Government’s Programme for Research in Third Level Institutions (CREATE) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher OSA - The Optical Society en
dc.relation.uri https://www.osapublishing.org/oe/abstract.cfm?uri=oe-27-3-3169
dc.rights © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement en
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ en
dc.subject Extinction coefficients en
dc.subject Reflectivity en
dc.subject Refractive index en
dc.subject Rigorous coupled wave analysis en
dc.subject Sensor performance en
dc.subject Total internal reflection en
dc.title Mid-infrared optical sensing using sub-wavelength gratings en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Liam Lewis, Tyndall National Institute, University College Cork, Cork, Ireland. +353-21-490-3000 Email: liam.lewis@tyndall.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Optics Express en
dc.internal.IRISemailaddress liam.lewis@tyndall.ie en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2276/IE/I-PIC Irish Photonic Integration Research Centre/ en
dc.identifier.eissn 1094-4087

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© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement Except where otherwise noted, this item's license is described as © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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