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dc.contributor.advisorHassan, Ahmed M.
dc.contributor.authorKiddle, Daniel S.
dc.date.issued2017
dc.date.submitted2017 Summer
dc.descriptionTitle from PDF of title page viewed October 30, 2017
dc.descriptionThesis advisor: Ahmed M. Hassan
dc.descriptionVita
dc.descriptionIncludes bibliographical references (pages 55-60)
dc.descriptionThesis (M.S.)--School of Computing and Engineering. University of Missouri--Kansas City, 2017
dc.description.abstractNanowires possess extraordinary mechanical, thermoelectric and electromagnetic properties which led to their incorporation in a wide variety of applications. The purpose of this study is to investigate the effect of material on the electromagnetic response of these nanowires. We used the Method of Moments (MOM) for Arbitrarily Thin Wire (ATW) formulation as an efficient computational technique for calculating the electromagnetic response of nanowires. To explain the calculated electromagnetic response, we evoked the Characteristic Mode Analysis (CMA) which decomposes the current on the wire into a superposition of fundamental current modes. These modes are weighted by two coefficients: (i) the relative importance of each mode at a certain frequency, termed Modal Significance, and (ii) the level of coupling between the incident field and the mode termed the Modal Excitation Coefficient. In this, work we study how the wire’s material affect the Modal Significance and the Modal Excitation Coefficient of nanowires. Our results show that the material of the nanowire has a strong effect on the resonance frequency, the bandwidth, and the overlap of the modes showing that the material of the nanowire can be used as a tuning factor to develop sensors with desired radiation characteristics. Nanowires are commonly grown vertically on a substrate and, therefore, we also study the effect of the presence of a lossy dielectric half-space on their electromagnetic response. To efficiently account for this interface, we utilize a modified Green’s function using the rigorous Sommerfeld integrals. Our results show that the relative permittivity of the substrate decreases the resonance frequencies of the nanowires and significantly alters their radiation patterns. Most importantly, we find that, if the nanowire is near the interface, its evanescent field’s couple to the dielectric half space leading to the majority of the scattered power radiated into the substrate with high directivity. The results of this thesis has the potential to quantify the electromagnetic response of vertical nanowires in their realistic environment as well as facilitate the incorporation of nanowires in novel sensing applications.eng
dc.description.tableofcontentsIntroduction -- Theoretical model -- Dielectric and magnetic properties of nanowires and microwires -- Graphical user interface -- Results and discussion -- Conclusion and future work
dc.format.extentxi, 61 pages
dc.identifier.urihttps://hdl.handle.net/10355/61855
dc.publisherUniversity of Missouri--Kansas Cityeng
dc.subject.lcshNanowires -- Electric properties
dc.subject.lcshNanowires -- Magnetic properties
dc.subject.otherThesis -- University of Missouri--Kansas City -- Engineering
dc.titleA Characteristic Mode Analysis of Conductive Nanowires and Microwires Above a Lossy Dielectric Half-Spaceeng
dc.typeThesiseng
thesis.degree.disciplineElectrical Engineering (UMKC)
thesis.degree.grantorUniversity of Missouri--Kansas City
thesis.degree.levelMasters
thesis.degree.nameM.S.


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