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Identifier 000411943
Title Development of high temperature single photon emitters based on InAs piezoelectric quantum dots
Alternative Title Ανάπτυξη μονοφωτονικών πηγών υψηλών θερμοκρασιών με βάση πιεζοηλεκτρικές κβαντικές τελείες InAs
Author Θυρής, Ιωάννης Μ.
Thesis advisor Πελεκάνος, Νικόλαος
Reviewer Χατζόπουλος, Ζαχαρίας
Κοπιδάκης, Γεώργιος
Abstract The present thesis is focused on InAs piezoelectric quantum dots grown on the (211)B crystallographic orientation, for the development of single-photon sources operating at high temperatures. Single photons are good candidates for the realization of qubits based on photon polarization states, needed for quantum information schemes. At first, a brief introduction to the piezoelectric quantum dots is given, as well as the relevant background. Then, after introducing the short-period super-lattice, a core element to our structures for high temperature emission, an experimental investigation is presented on samples grown for the purposes of this thesis and their emission at high temperatures is characterized through temperature-dependent photoluminescence measurements. Later, the notion of embedding our quantum dots in micro-cavities for enhancing the detected signal is presented. After the introduction on how a micro-cavity affects the quantum dot emission, an experimental study on micro-cavity samples is presented. Their quantum dot emission is characterized through photoluminescence, the cavity characteristics by reflectivity measurements, while on the sample with the most intense emission, micro-photoluminescence measurements have been performed, after the formation of micro-pillars. Lastly, the mechanism related to the low indium content of our dots is discussed, as well as the notion of using an AlAs capping-layer to increase it. An experimental investigation is presented on the effect of depositing a thin AlAs capping layer ontop of the dots to their emission and structural properties.
Language English
Subject AlAs capping-layer
Short-Period Super-Lattice
Single-Dot spectroscopy
Single-Photon emitters
Μονοφωτονικές πηγές
Issue date 2017-11-22
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Physics--Post-graduate theses
  Type of Work--Post-graduate theses
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