Abstract

Energy transfer experiments were realized using a confocal microscope adapted for scanning the spatial distribution of emitted luminescence from the sample surface with micrometer resolution. The photon propagation provided by the luminescence spatial distribution was measured, and the energy transfer among the dots was discussed. Energy transfer processes in CdSe/ZnS quantum dots (QDs) were used for this study. We have investigated also the behavior of the energy transfer processes upon the inter-dot distance. The photon migration length (PML) increases by increasing the QD concentration. The PML reaches the highest value for a given QD concentration, i.e., for a specific inter-dot distance.

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