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- W3080865904 abstract "We report on several experiments using singleexcitons conned to single semiconductor quantum dots (QDs).Electric and magnetic elds have previously been used asexperimental knobs to understand and control individual excitons insingle quantum dots. We realize new ways of electric eld controlby changing materials and device geometry in the rst twoexperiments with strain-based InAs QDs. A standard Schottky diodeheterostructure is demonstrated with graphene as the Schottky gatematerial, and its performance is bench-marked against a diode witha standard gate material, semi-transparent nickel-chromium (NiCr).This change of materials increases the photon collection rate byeliminating absorption in the metallic NiCr layer. A second set ofexperiments investigates the electric eld response of QDs as apossible metrology source. A linear voltage potential drop in aplane near the QDs is used to describe how the spatially varyingvoltage prole is also imparted on the QDs. We demonstrate aprocedure to map this voltage prole as a preliminary route towardsa full quantum sensor array. Lastly, InAs QDs are explored aspotential spin-photon interfaces. We describe how a magnetic eldis used to realize a reversible exchange of information betweenlight and matter, including a discussion of thepolarization-dependence of the photoluminesence, and how that canbe linked to the spin of a resident electron or hole. We presentevidence of this in two wavelength regimes for InAs quantum dots,and discuss how an external magnetic field informs the spinphysics of these 2-level systems. This thesis concludes with thediscovery of a new class of quantum dots. As-yet unidentied defectstates in single layer tungsten diselenide (WSe2) are shown tohost quantum light emission. We explore the spatial extent ofelectron connement and tentatively identify a radiative lifetime of~1 ns for these single photon emitters." @default.
- W3080865904 created "2020-09-01" @default.
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- W3080865904 date "2017-01-01" @default.
- W3080865904 modified "2023-09-27" @default.
- W3080865904 title "Quantum dot photonics" @default.
- W3080865904 hasPublicationYear "2017" @default.
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