Processing techniques, structural configurations, and electric field influence in Pyramidal Quantum Dots: an experimental and simulative investigation

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dc.contributor.advisorPelucchi, Emanuele
dc.contributor.advisorJuska, Gediminas
dc.contributor.authorColavecchi, Lucaen
dc.date.accessioned2026-01-20T11:30:54Z
dc.date.available2026-01-20T11:30:54Z
dc.date.issued2025
dc.date.submitted2025
dc.description.abstractQuantum computing promises to revolutionize information processing by leveraging quantum superposition and entanglement to perform calculations unattainable by classical computers. Among the various solid-state platforms employed in the quest for its practical realization, Quantum Dots (QDs) stand out as scalable and optically addressable artificial atoms, ideal for single-/entangled- photon sources and spin based qubits. However, several challenges arising from the intrinsic properties of QDs still need to be addressed: the earlier development of optoelectronic technologies established key standards in terms of wavelength. As a result, QDs must be engineered to integrate seamlessly with existing platforms, one approach being precise emission wavelength tuning; external tuning is also a strategy to address the Fine Structure Splitting (FSS) of the exciton level, whose reduction is crucial to increase the degree of entanglement; efficient light-matter interaction is pivotal to harness their full potential, requiring engineered photonic environments that enhance emission properties and enable weak and strong coupling regimes. In my thesis I have studied site-controlled Pyramidal Quantum Dots (PQDs) grown via MOVPE inside tetrahedral recesses defined on <111>B oriented GaAs substrates. This work puts emphasis on the post-growth processing that we generally perform to increase brightness, highlighting the huge impact that simple techniques like bonding, grinding and etching can have on the outcome in terms of specimen yield and photoluminescence.
dc.description.statusNot peer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationColavecchi, L. 2025. Processing techniques, structural configurations, and electric field influence in Pyramidal Quantum Dots: an experimental and simulative investigation. PhD Thesis, University College Cork.
dc.identifier.endpage175
dc.identifier.urihttps://hdl.handle.net/10468/18413
dc.language.isoenen
dc.publisherUniversity College Corken
dc.rights© 2025, Luca Colavecchi.
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subjectQuantum dotsen
dc.subjectSemiconductor processing and fabricationen
dc.titleProcessing techniques, structural configurations, and electric field influence in Pyramidal Quantum Dots: an experimental and simulative investigation
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD - Doctor of Philosophyen
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