Anomalous exciton lifetime by an electromagnetic coupling of self-assembled quantum dots

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dc.creatorBogaart, E. W.
dc.creatorHaverkort, J. E. M.
dc.date2007-08-02
dc.date.accessioned2026-07-07T08:22:01Z
dc.date.available2026-07-07T08:22:01Z
dc.descriptionWe report on the experimental observation of a hitherto ignored long-range electromagnetic coupling between self-assembled quantum dots. A 12 times enhancement of the quantum dot exciton lifetime is observed by means of time-resolved differential reflection spectroscopy. The enhancement is explained by utilizing and extending the local field effects as developed in \emph{Phys. Rev. B \textbf{64},125326 (2001)}. The electromagnetic coupling of the quantum dots results in a collective polarizability, and is observed as a suppression of the emission rate. Our results reveal that the coupling is established over a distance exceeding 490 nm. Moreover, the mutual coupling strength is optically tuned by varying the pump excitation density and enables us to optically tune the exciton lifetime.
dc.description4 figures
dc.identifierhttps://arxiv.org/abs/0708.0418
dc.identifierhttp://arxiv.org/abs/0708.0418
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/135515
dc.subjectOther Condensed Matter
dc.titleAnomalous exciton lifetime by an electromagnetic coupling of self-assembled quantum dots
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