Band-Edge Exciton Fine Structure of Single CdSe-ZnS Nanocrystals in External Magnetic Fields
Langue
en
Article de revue
Ce document a été publié dans
Physical Review Letters. 2010-10-08, vol. 105, p. 157402
American Physical Society
Résumé en anglais
We report a spectroscopic study of the two lowest-energy exciton levels of individual CdSe-ZnS nanocrystals under applied magnetic fields. Field-induced coupling between the bright and the dark excitonic states is directly ...Lire la suite >
We report a spectroscopic study of the two lowest-energy exciton levels of individual CdSe-ZnS nanocrystals under applied magnetic fields. Field-induced coupling between the bright and the dark excitonic states is directly observed in the low-temperature photoluminescence spectrum and decay and allows the determination of the angle between the nanocrystal c axis and the field. Orientation-dependent Zeeman splittings of the dark and bright exciton sublevels are measured and provide the corresponding exciton Landé factors, as well as spin-flip relaxation rates between Zeeman sublevels.< Réduire
Mots clés en anglais
single nanocrystals
exciton fine structure
Zeeman splittings
Project ANR
PROtocoles quantiques utilisant des Sources à Photons unIQues - ANR-06-NANO-0041
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