Enhancing the Sensitivity of NDIR Spectroscopy Using Plasmonic Crystal Structures

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atmire.migration.oldid4265
dc.contributor.advisorKim, Seonghwan (Sam)
dc.contributor.authorAhmed, Amr Elsayed Shebl Mahmoud
dc.contributor.committeememberMohamad, Abdulmajeed
dc.contributor.committeememberMurari, Kartikeya
dc.contributor.committeememberSanati Nezhad, Amir
dc.date.accessioned2016-04-25T21:06:51Z
dc.date.available2016-04-25T21:06:51Z
dc.date.issued2016
dc.date.submitted2016en
dc.description.abstractMonitoring the concentration of methane is of crucial importance for health, safety, and maintenance. NDIR spectroscopy is a widely used commercially available method of monitoring the concentration of Gases. Enhancing the sensitivity of the IR detector enhances the limit of detection of NDIR sensors. Plasmonic crystal structures have been shown to enhance the absorption of EM radiation at certain wavelengths depending on their dimensions. In this thesis, a 13 fold enhancement in the LOD of a methane NDIR gas sensor was achieved by designing a plasmonic crystal structure. The structure is a layer of gold with a two dimensional array of micro sized holes. The dimensions of the structure were optimized by COMSOL simulations to get maximum absorption at λ=7.7 µm. The structure was fabricated and the NDIR sensor was developed to experimentally show the enhancement. The experimental results showed good agreement with the simulations and achieved the expected enhancement.en_US
dc.identifier.citationAhmed, A. E. (2016). Enhancing the Sensitivity of NDIR Spectroscopy Using Plasmonic Crystal Structures (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/25911en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/25911
dc.identifier.urihttp://hdl.handle.net/11023/2899
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectEngineering--Mechanical
dc.subject.classificationNDIRen_US
dc.subject.classificationPlasmonicsen_US
dc.subject.classificationMEMSen_US
dc.subject.classificationSensorsen_US
dc.subject.classificationPyroelectric Detectorsen_US
dc.titleEnhancing the Sensitivity of NDIR Spectroscopy Using Plasmonic Crystal Structures
dc.typemaster thesis
thesis.degree.disciplineMechanical and Manufacturing Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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