Physics and applications of coupled-cavity structures in photonic crystals

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buir.advisorOzbay, Ekmel
dc.contributor.authorBayındır, Mehmet
dc.date.accessioned2016-01-08T20:19:43Z
dc.date.available2016-01-08T20:19:43Z
dc.date.issued2002
dc.descriptionAnkara : The Department of Physics and the Institute of Engineering and Science of Bilkent Univ., 2002.en_US
dc.descriptionThesis (Ph. D.) -- Bilkent University, 2002.en_US
dc.descriptionIncludes bibliographical references leaves 71-83.en_US
dc.description.abstractWe proposed and demonstrated a new type of propagation mechanism for the electromagnetic waves in photonic band gap materials. Photons propagate through coupled cavities due to interaction between the highly localized neighboring cavity modes. We reported a novel waveguide, which we called coupled-cavity waveguide (CCW), in two- and three-dimensional photonic structures. By using CCWs, we demonstrated lossless and reflectionless waveguide bends, efficient power splitters, and photonic switches. We also experimentally observed the splitting of eigenmodes in coupled-cavities and formation of defect band due to interaction between the cavity modes. We reported the modification of spontaneous emission from hydrogenated amorphous silicon-nitride and silicon-oxide multilayers with coupled Fabry-Perot microcavities. We observed that the spontaneous emission rate is drastically enhanced at the coupledmicrocavity band edges due to very long photon lifetime. We also simulated our photonic structures by using the Transfer-Matrix-Method (TMM) and the Finite-Difference-Time-Domain (FDTD) method. The tight-binding (TB) approach, which was originally developped for the electronic structure calculations, is applied to the photonic structures, and compared to our experimental results. The measured results agree well with the simulations and the prediction of TB approximation. The excellent agreement between the measured, simulated, and the TB results is an indication of potential usage of TB approximation in photonic structures. Our achievements open up a new research area, namely physics and applications of coupled-cavities, in photonic structures. These results are very promising to construct for the future all-optical components on a single chip.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T20:19:43Z (GMT). No. of bitstreams: 1 1.pdf: 78510 bytes, checksum: d85492f20c2362aa2bcf4aad49380397 (MD5)en
dc.description.statementofresponsibilityBayındır, Mehmeten_US
dc.format.extentvii, 83 leaves, illustrations, 30 cmen_US
dc.identifier.urihttp://hdl.handle.net/11693/18482
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPhotonic Crystalen_US
dc.subjectPhotonic Band Gap (PBG)en_US
dc.subjectDefecten_US
dc.subjectFabry-Perot Cavityen_US
dc.subjectWaveguideen_US
dc.subjectTransfer Matrix Method (TMM)en_US
dc.subjectFinite-Difference-Time-Domain (FDTD) Methoden_US
dc.subjectTight-Binding (TB) Approximationen_US
dc.subjectCoupled-Cavity Waveguides (CCW)en_US
dc.subjectPower Splitteren_US
dc.subjectPhotonic Switchesen_US
dc.subjectWavelengthDivision-Multiplexing (WDM)en_US
dc.subjectSpontaneous Emissionen_US
dc.subject.lccQC793.5.P427 B39 2002en_US
dc.subject.lcshPhotons.en_US
dc.subject.lcshCrystal optics.en_US
dc.subject.lcshFabry-Perot interferometer.en_US
dc.titlePhysics and applications of coupled-cavity structures in photonic crystalsen_US
dc.typeThesisen_US
thesis.degree.disciplinePhysics
thesis.degree.grantorBilkent University
thesis.degree.levelDoctoral
thesis.degree.namePh.D. (Doctor of Philosophy)

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