Optical near field interaction of spherical quantum dots

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buir.advisorDemir, Hilmi Volkan
dc.contributor.authorAmirahmadov, Togay
dc.date.accessioned2016-01-08T18:21:58Z
dc.date.available2016-01-08T18:21:58Z
dc.date.issued2012
dc.departmentDepartment of Physicsen_US
dc.descriptionAnkara : The Department of Physics and the Graduate School of Engineering and Science of Bilkent Univ., 2012.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2012.en_US
dc.descriptionIncludes bibliographical references leaves 55-60.en_US
dc.description.abstractNanometer-sized materials can be used to make advanced photonic devices. However, as far as the conventional far-field light is concerned, the size of these photonic devices cannot be reduced beyond the diffraction limit of light, unless emerging optical near-fields (ONF) are utilized. ONF is the localized field on the surface of nanometric particles, manifesting itself in the form of dressed photons as a result of light-matter interaction, which are bound to the material and not massless. In this thesis, we theoretically study a system composed of differentsized quantum dots involving ONF interactions to enable optical excitation transfer. Here this is explained by resonance energy transfer via an optical nearfield interaction between the lowest state of the small quantum dot and the first dipole-forbidden excited state of the large quantum dot via the dressed photon exchange for a specific ratio of quantum dot size. By using the projection operator method, we derived the formalism for the transfered energy from one state to another for strong confinement regime for the first time. We performed numerical analyses of the optical near-field energy transfer rate for spherical colloidal quantum dots made of CdSe, CdTe, CdSe/ZnS and PbSe. We estimated that the energy transfer time to the dipole forbidden states of quantum dot is sufficiently shorter than the radiative lifetime of excitons in each quantum dot. This model of ONF is essential to understanding and designing systems of such quantum dots for use in near-field photonic devices.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityAmirahmadov, Togayen_US
dc.format.extentxii, 84 leaves, billustrationsen_US
dc.identifier.urihttp://hdl.handle.net/11693/15641
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectoptical near fielden_US
dc.subjectdressed photonen_US
dc.subjectresonance energy transferen_US
dc.subjectexcitonsen_US
dc.subject.lccTA1520 .A55 2012en_US
dc.subject.lcshPhotonics.en_US
dc.subject.lcshNanophotonics.en_US
dc.subject.lcshQuantum optics.en_US
dc.subject.lcshNear-field microscopy.en_US
dc.subject.lcshNanostructures.en_US
dc.subject.lcshEnergy transfer.en_US
dc.subject.lcshQuantum dots.en_US
dc.titleOptical near field interaction of spherical quantum dotsen_US
dc.typeThesisen_US
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