Sökning: "semiconductor quantum dots"

Visar resultat 11 - 15 av 93 avhandlingar innehållade orden semiconductor quantum dots.

  1. 11. Thermoelectric experiments on nanowire-based quantum dots

    Författare :Artis Svilans; NanoLund: Centre for Nanoscience; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quantum dots; Nanowire; Thermoelectric; Maximum power; Efficientcy; Carnot; Kondo effect; Fysicumarkivet A:2018:Svilans;

    Sammanfattning : This thesis experimentally investigates the possibilities of using quantum effects in semiconductor nanostructures for engineering their thermoelectric properties. More specifically, heterostructured InAs/InP nanowires are used to create short InAs quantum dots (QDs) with electronic state structure resembling that found in atoms. LÄS MER

  3. 12. Optical Properties of Single Silicon Quantum Dots

    Författare :Federico Pevere; Jan Linnros; Uwe Kortshagen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; silicon; nanocrystals; quantum dots; photoluminescence; optics; emission; absorption; Fysik; Physics;

    Sammanfattning : For over 60 years silicon (Si) has dominated the semiconductor microelectronics industry mainly due to its abundance and good electrical and material properties. The advanced processing technology of Si has made it the workhorse for photovoltaics industry as well. LÄS MER

  4. 13. Quantum transport and spin effects in lateral semiconductor nanostructures and graphene

    Författare :Martin Evaldsson; Igor Zozoulenko; Vidar Gudmundsson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Electronic transport; Spin related phenomena; Quantum dots; Quantum wires; Two-dimensional electron gas; 2DEG; Graphene; Computational physics; Beräkningsfysik; Physics; Fysik;

    Sammanfattning : This thesis studies electron spin phenomena in lateral semi-conductor quantum dots/anti-dots and electron conductance in graphene nanoribbons by numerical modelling. In paper I we have investigated spin-dependent transport through open quantum dots, i.e., dots strongly coupled to their leads, within the Hubbard model. LÄS MER

  5. 14. Interaction effects in the transport of particles in nanowire quantum dots

    Författare :Liney Halla Kristinsdottir; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wigner localization; atom transport; electron transport; ultracold dipolar gases; Quantum dots; semiconductor nanowires; current blockade; thermopower; Fysicumarkivet A:2015:Kristinsdottir;

    Sammanfattning : Interactions between physical bodies constantly affect their properties. This thesis presents a theoretical study on the effects of interaction in few-body nanowire quantum dots. LÄS MER

  7. 15. Bright and strain-tunable semiconductor quantum dot devices

    Författare :Thomas Lettner; Val Zwiller; Klaus D. Jöns; Oliver Benson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum dots; single–photons; entanglement; strain–tunable; kvantprickar; singelfotoner; sammanflätning; töjnings-justerbar; Optik och fotonik; Optics and Photonics;

    Sammanfattning : Optically active semiconductor quantum dots have proven to be excellent single- and entangled-photon sources, with applications in quantum optics and quantum photonics. These sources are considered crucial in the development of future photonic quantum technology, such as quantum communication, quantum computation and quantum metrology. LÄS MER