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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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en
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4
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Physical Review B, Volume 62, issue 3, pp. 1592-1595
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.
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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