Samenvatting
The nature of the ground optical transition in (In, Ga)As/GaP quantum dots is thoroughly investigated through k·p calculations and a supercell tight-binding simulation. Quantum dot morphology is deduced from scanning-tunneling-microscopy images. The strain field has a strong influence on the conduction band states. Indeed, for a pure GaAs QD, the wavefunction of the ground electron state is spatially confined in the GaP matrix, close to the dot apex, in a tensile strain region, having mainly Xz character. Time resolved and hydrostatic pressure photoluminescence experiments strongly support the theoretical conclusions. Promising results from the literature on (In, Ga)As/GaP quantum dot will be reviewed.
Originele taal-2 | Engels |
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Titel | 26th International Conference on Indium Phosphide and Related Materials, IPRM 2014 |
Uitgeverij | Institute of Electrical and Electronics Engineers |
Aantal pagina's | 2 |
ISBN van geprinte versie | 9781479957293 |
DOI's | |
Status | Gepubliceerd - 2014 |
Evenement | 26th International Conference on Indium Phosphide and Related Materials (IPRM 2014) - Montpellier, Frankrijk Duur: 11 mei 2014 → 15 mei 2014 Congresnummer: 26 |
Congres
Congres | 26th International Conference on Indium Phosphide and Related Materials (IPRM 2014) |
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Verkorte titel | IPRM 2014 |
Land/Regio | Frankrijk |
Stad | Montpellier |
Periode | 11/05/14 → 15/05/14 |
Ander | 26th International Conference on Indium Phosphide and Related Materials |