Journal
APPLIED PHYSICS LETTERS
Volume 78, Issue 21, Pages 3214-3216Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1371965
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Time-resolved photoluminescence (PL) from InAs/GaAs quantum dots with a bimodal size distribution is used to investigate the dynamic carrier-transfer processes which couple transfer between similarly sized quantum dots and between quantum dots in different size categories. The relationship between the decay time and the emission energy appears staircaselike and the energetic positions of the steps as well as the shape can be correlated to the shape of the steady-state PL emission through a rate-equation theory. These results show how transient PL can be used to investigate the dynamics of carrier transfer in quantum-dot systems. (C) 2001 American Institute of Physics.
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