Effects of a few-particle interaction on the atomiclike levels of a single strain-induced quantum dot
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2000-07-15
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Language
en
Pages
4
1592-1595
1592-1595
Series
PHYSICAL REVIEW B, Volume 62, issue 3
Abstract
We investigate the effects of few-particle population of a single strain-induced quantum dot by optical excitation. The low-power photoluminescence spectra consist of sharp lines with energy separation of a few meV, associated to the formation of excitonic molecules in the single dot. With increasing photoexcitation intensity, the population of higher states is observed; however, we also observe a clear intensity dependence of the transition energies, inconsistent with a simple filling of exciton levels. Based on a theoretical model for interacting electron-hole pairs in the dot, we obtain good agreement with experiment and show that exciton-exciton interactions control the spectral changes as the number of pairs is increased.Description
Keywords
photoluminescence, quantum dot, stressor
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Citation
Rinaldi , R , Antonaci , S , De Vittorio , M , Cingolani , R , Hohenester , U , Molinari , E , Lipsanen , H & Tulkki , J 2000 , ' Effects of a few-particle interaction on the atomiclike levels of a single strain-induced quantum dot ' , Physical Review B , vol. 62 , no. 3 , pp. 1592-1595 . https://doi.org/10.1103/PhysRevB.62.1592