Design of compact optical devices based on periodic meta-structures

buir.advisorÖzbay, Ekmel
dc.contributor.authorAkosman, Ahmet Emin
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
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 115-133.en_US
dc.description.abstractManipulation of the flow of light is demanded for several applications such as communication, data storage, sensor, photovoltaic cells, microscopy, lasers and light emitting diodes for the purpose of designing compact, high-throughput and high efficiency optical devices. Nevertheless, the control of the propagation of the light becomes much harder in devices with smaller geometries mostly because of diffractions, loss mechanisms and fabrication difficulties. Furthermore, materials that are already available in the nature do not provide unprecedented optical properties for nanoscale optical applications. Due to this fact that fabrication of artificial materials is needed for utilizing novel and intriguing optical devices. For this purpose, some relatively new research fields have emerged like photonic crystals, metamaterials and high contrast gratings. We propose several designs based on aforementioned meta-structures to achieve compact and practically realizable optical devices. We presented compact optical demultiplexer, diode-like device and electro-optic modulator designs that are based on photonic crystals. We also proposed two circular polarizer designs based on metamaterials and high contrast gratings. Further, we investigated unidirectional transmission and polarization manipulation properties in chiral metamaterials. For most of the proposed designs, we also experimentally verified the numerical and theoretical findings. In conclusion, we can claim that the utilization of artifically structured materials give opportunity to realize the control of light much more easily in nanoscale designs.en_US
dc.description.statementofresponsibilityAkosman, Ahmet Eminen_US
dc.format.extentxv, 133 leaves, graphsen_US
dc.publisherBilkent Universityen_US
dc.subjectPhotonic Crystalsen_US
dc.subjectHigh Contrast Gratingsen_US
dc.subjectSlow Light,en_US
dc.subjectOptical Demultiplexingen_US
dc.subjectAsymmetric Transmissionen_US
dc.subjectCircular Polarizationen_US
dc.subject.lccQC374 .A46 2013en_US
dc.subject.lcshOptical materials.en_US
dc.subject.lcshNanostructured materials.en_US
dc.subject.lcshOptoelectronic devices.en_US
dc.subject.lcshCrystal optics.en_US
dc.titleDesign of compact optical devices based on periodic meta-structuresen_US
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