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Título

Absorption and photoluminescence spectroscopy on a single self-assembled charge-tunable quantum dot

AutorSeidl, Stefan; Kroner, M.; Dalgarno, P. A.; Högele, A.; Smith, J. M.; Ediger, M.; Gerardot, B. D.; García Martínez, Jorge Manuel ; Petroff, Pierre M.; Karrai, Khaled; Warburton, Richard J.
Palabras claveSpectroscopy
Quantum dot
Fecha de publicación28-nov-2005
EditorAmerican Physical Society
CitaciónPhysical Review B 72: 195339 (2005)
ResumenWe have performed detailed photoluminescence (PL) and absorption spectroscopy on the same single self-assembled quantum dot in a charge-tunable device. The transition from neutral to charged exciton in the PL occurs at a more negative voltage than the corresponding transition in absorption. We have developed a model of the Coulomb blockade to account for this observation. At large negative bias, the absorption broadens as a result of electron and hole tunneling. We observe resonant features in this regime whenever the quantum dot hole level is resonant with two-dimensional hole states located at the capping layer-blocking barrier interface in our structure.
Versión del editorhttp://link.aps.org/doi/10.1103/PhysRevB.72.195339
http://dx.doi.org/10.1103/PhysRevB.72.195339
URIhttp://hdl.handle.net/10261/19175
DOI10.1103/PhysRevB.72.195339
ISSN1098-0121
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