Show simple item record

dc.contributor.advisorÖzbay, Ekmel
dc.contributor.authorMutlu, Mehmet
dc.date.accessioned2016-01-08T20:06:03Z
dc.date.available2016-01-08T20:06:03Z
dc.date.issued2013
dc.identifier.urihttp://hdl.handle.net/11693/17065
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Graduate School of Engineering and Science of Bilkent Univ., 2013.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2013.en_US
dc.descriptionIncludes bibliographical references leaves 159-173.en_US
dc.description.abstractThe utilization of purposely designed artificial media with engineered electromagnetic responses enables the obtaining of intriguing features that are either impossible or difficult to realize using readily available natural materials. Here, we focus on two classes of artificial media: metamaterials and high-contrast gratings. Metamaterials and high-contrast gratings are designed within the subwavelength periodicity range and therefore, they are non-diffractive. We exploit the magnetoelectric coupling effect in chiral metamaterials to design several structures. Firstly, we design a linear to circular polarization convertor that operates for x-polarized normally incident plane waves. Then, we combine the chirality feature and the electromagnetic tunneling phenomenon to design a polarization insensitive 90◦ polarization rotator that exhibits unity transmission and crosspolarization conversion efficiencies. Subsequently, we combine this polarization rotator with a symmetric metallic grating with a subwavelength slit for the purpose of enabling the one-way excitation of spoof surface plasmons and achieving a reversible diodelike beaming regime. Then, we exploit the asymmetric transmission property of chiral metamaterials and show that a polarization angle dependent polarization rotation and a strongly asymmetric diodelike transmission is realizable. Afterwards, a brief waveguide theory is provided and eventually, the dispersion relations for a periodic dielectric waveguide geometry are derived. Then, using these relations and considering the finiteness of the waveguide length, we show the theoretical description of high-contrast gratings. Finally, we theoretically and experimentally show that the achievement of a broadband quarter-wave plate regime is possible by using carefully designed high-contrast gratings.en_US
dc.description.statementofresponsibilityMutlu, Mehmeten_US
dc.format.extentxvii, 173 leaves, graphsen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectMetamaterialen_US
dc.subjectchiralityen_US
dc.subjectasymmetric transmissionen_US
dc.subjectspoof surface plasmonen_US
dc.subjectelectromagnetic tunnelingen_US
dc.subjectbeamingen_US
dc.subjecthigh-contrast gratingen_US
dc.subjectwave plateen_US
dc.subject.lccTK454.4.M3 M88 2013en_US
dc.subject.lcshMetamaterials.en_US
dc.subject.lcshPlasmons (Physics)en_US
dc.subject.lcshSurface plasmon resonance.en_US
dc.subject.lcshElectromagnetic waves--Polarization.en_US
dc.subject.lcshElectromagnetism.en_US
dc.subject.lcshTunneling.en_US
dc.subject.lcshChilarity.en_US
dc.titleChiral metamaterial and high-contrast grating based polarization selective devicesen_US
dc.typeThesisen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record