Lasing action and supercontinuum generation in nano- and micro-structures

buir.advisorBayındır, Mehmet
dc.contributor.authorAkbulut, Duygu
dc.departmentGraduate Program in Materials Science and Nanotechnologyen_US
dc.descriptionAnkara : The Program of Materials Science and Nanotechnology and the Institute of Engineering and Science of Bilkent University, 2009.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2009.en_US
dc.descriptionIncludes bibliographical references leaves 79-88.en_US
dc.description.abstractSupercontinuum generation is the substantial broadening of electromagnetic radiation due to nonlinear interactions with the transporting medium. It nds application in a wide range of areas, including spectroscopy, frequency metrology, optical coherence tomography and telecommunications. Whispering gallery mode microresonators con ne light in a micron scale area via total internal re ection mechanism. Among these structures, microtoroid is especially interesting since it combines ultrahigh quality factor and chip integrability. Applications of such structures include nonlinear and quantum optics, biological and chemical sensing, telecommunications and quantum electrodynamics. In the rst part of the present work, continuum generation from a nanostructured chalcogenide glass (As2Se3) core, high temperature polymer (polyethersulfone, PES) cladding ber was experimentally investigated. Simulation results for nonlinear interactions inside a microtoroid are also provided. In the second part, polymer coated toroidal microresonators were employed for observation of laser action. Owing to high quantum e ciency of the polymer, the observed lasing threshold has a very low value of 200 pJ/pulse despite free space excitation.en_US
dc.description.statementofresponsibilityAkbulut, Duyguen_US
dc.format.extentxii, 88 leaves, graphsen_US
dc.publisherBilkent Universityen_US
dc.subjectnonlinear opticsen_US
dc.subjectlaser actionen_US
dc.subjectconjugated polymersen_US
dc.subjecttoroidal microcavitiesen_US
dc.subjectchalcogenide glassesen_US
dc.subjectsupercontinuum generationen_US
dc.subject.lccQC689.5.L37 A53 2009en_US
dc.subject.lcshLaser pulses, Ultrashort.en_US
dc.subject.lcshNonlinear optics.en_US
dc.subject.lcshNanostructures--Optical properties.en_US
dc.subject.lcshMicrostructure--Optical properties.en_US
dc.titleLasing action and supercontinuum generation in nano- and micro-structuresen_US
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