Mid-infrared optical sensing using sub-wavelength gratings

Simple item page
dc.contributor.authorHogan, Brian
dc.contributor.authorLewis, Liam
dc.contributor.authorMcAuliffe, Michael
dc.contributor.authorHegarty, Stephen P.
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2019-11-20T06:03:22Z
dc.date.available2019-11-20T06:03:22Z
dc.date.issued2019-02-04
dc.description.abstractOptical 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.sponsorshipCork Institute of Technology (RISAM); Irish Government’s Programme for Research in Third Level Institutions (CREATE)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationHogan, 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.27.003169en
dc.identifier.doi10.1364/OE.27.003169en
dc.identifier.eissn1094-4087
dc.identifier.endpage3179en
dc.identifier.issued3en
dc.identifier.journaltitleOptics Expressen
dc.identifier.startpage3169en
dc.identifier.urihttps://hdl.handle.net/10468/9150
dc.identifier.volume27en
dc.language.isoenen
dc.publisherOSA - The Optical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2276/IE/I-PIC Irish Photonic Integration Research Centre/en
dc.relation.urihttps://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 Agreementen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectExtinction coefficientsen
dc.subjectReflectivityen
dc.subjectRefractive indexen
dc.subjectRigorous coupled wave analysisen
dc.subjectSensor performanceen
dc.subjectTotal internal reflectionen
dc.titleMid-infrared optical sensing using sub-wavelength gratingsen
dc.typeArticle (peer-reviewed)en
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
oe-27-3-3169.pdf
Size:
2.8 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Tyndall National Institute - Journal Articles