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Título

Fine Structure of Highly Charged Excitons in Semiconductor Quantum Dots

AutorUrbaszek, B.; Warburton, Richard J.; Karrai, Khaled; Gerardot, B. D.; Petroff, Pierre M.; García Martínez, Jorge Manuel
Palabras claveSemiconductor quantum dots
Excitons
Fecha de publicación20-jun-2003
EditorAmerican Physical Society
CitaciónPhysical Review Letters 90, 247403 (2003)
ResumenAn exciton in a symmetric semiconductor quantum dot has two possible states, one dark and one bright, split in energy by the electron-hole exchange interaction. We demonstrate that for a doubly charged exciton, there are also two states split by the electron-hole exchange, but both states are now bright. We also uncover a fine structure in the emission from the triply charged exciton. By measuring these splittings, and also those from the singly charged and doubly charged biexcitons, all on the same quantum dot, we show how the various electron-hole exchange energies can be measured without having to break the symmetry of the dot.
Descripción4 páginas, 3 figuras, 2 tablas.-- PACS numbers: 78.55.Cr, 71.70.Gm, 73.21.La, 78.67.Hc
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.90.247403
URIhttp://hdl.handle.net/10261/25183
DOI10.1103/PhysRevLett.90.247403
ISSN0031-9007
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