Optical gain and lasing of colloidal semiconductor quantum wells intimately integrated into optical cavities

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buir.advisorDemir, Hilmi Volkan
dc.contributor.authorSak, Mustafa
dc.date.accessioned2019-08-06T12:25:12Z
dc.date.available2019-08-06T12:25:12Z
dc.date.copyright2019-07
dc.date.issued2019-07
dc.date.submitted2019-07-23
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.) : Bilkent University, Department of Electrical and Electronics Engineering, İhsan Doğramacı Bilkent University, 2019.en_US
dc.descriptionIncludes bibliographical references (leaves 59-67).en_US
dc.description.abstractColloidal semiconductor quantum wells, also known as nanoplatelets (NPLs), attract an increasingly greater deal of interest as a promising material platform for light-generating applications. The superior optical properties of NPLs including their ultra-large absorption cross-sections, purely homogeneous broadening, and suppressed Auger recombination make them highly attractive for solution-processable color convertors, LEDs and lasers. In this thesis, we studied the optical gain properties and performance levels of tailored heterostructures of such NPLs intimately integrated into various optical cavities. To do so, we systematically measured their amplified spontaneous emission under one- and twophoton absorption excitations. Also, with these hetero-NPLs as the gain media, we have proposed and demonstrated a new class of practical whispering gallery mode (WGM) NPL-fiber architecture with high stability and low lasing thresholds enabled by record low waveguide loss coefficients in its class. Moreover, we have developed a single-mode vertical-cavity surface-emitting laser (VCSEL) of these hetero-NPLs closely integrated into the wedge cavity of a pair of distributed Bragg reflectors, leading to a record low lasing threshold in its class. The findings obtained in these WGM NPL-laser and NPLVCSEL structures indicate that these NPLs are excellent for high-performance colloidal lasing.en_US
dc.description.degreeM.S.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2019-08-06T12:25:12Z No. of bitstreams: 1 MustafaSak_Thesis.pdf: 3259592 bytes, checksum: a1b5a22bac89c2f67dcb3c299e366059 (MD5)en
dc.description.provenanceMade available in DSpace on 2019-08-06T12:25:12Z (GMT). No. of bitstreams: 1 MustafaSak_Thesis.pdf: 3259592 bytes, checksum: a1b5a22bac89c2f67dcb3c299e366059 (MD5) Previous issue date: 2019-07en
dc.description.statementofresponsibilityby Mustafa Saken_US
dc.embargo.release2020-01-23
dc.format.extentxiv, 67 leaves : charts (some color) ; 30 cm.en_US
dc.identifier.itemidB139625
dc.identifier.urihttp://hdl.handle.net/11693/52302
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSemiconductor nanocrystalsen_US
dc.subjectColloidal nanoplateletsen_US
dc.subjectOptical gainen_US
dc.subjectWhisperinggallery- mode laseren_US
dc.subjectVertical-cavity surface-emitting laseren_US
dc.titleOptical gain and lasing of colloidal semiconductor quantum wells intimately integrated into optical cavitiesen_US
dc.title.alternativeOptik çınlaçlar içinde yakinen tümleştirilmiş koloidal yarıiletken kuantum kuyularının optik kazancı ve lazer eylemien_US
dc.typeThesisen_US

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Dept. of Electrical and Electronics Engineering - Master's degree