Single InxGa1-xAs/GaAs quantum dot photoluminescence spectra, obtained by low-temperature near-field scanning optical microscopy, are compared with theoretically derived optical spectra. The spectra show shell filling as well as few-particle fine structure associated with neutral and charged multiexcitons, in good agreement with the many-body calculations. There appears to be a greater tendency to charged-exciton formation, which is discussed in terms of the high diffusivity of photogenerated electrons.
Dominance of Charged Excitons in Single Quantum Dot Photoluminescence Spectra / M., L., A., V., T. K., J., R., R., A., P., R., C., S., P., M., L., M., A., Troiani, F., Molinari, E.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 66:(2002), pp. 041302-041302. [10.1103/PhysRevB.66.041302]
Dominance of Charged Excitons in Single Quantum Dot Photoluminescence Spectra
TROIANI, Filippo;MOLINARI, Elisa
2002
Abstract
Single InxGa1-xAs/GaAs quantum dot photoluminescence spectra, obtained by low-temperature near-field scanning optical microscopy, are compared with theoretically derived optical spectra. The spectra show shell filling as well as few-particle fine structure associated with neutral and charged multiexcitons, in good agreement with the many-body calculations. There appears to be a greater tendency to charged-exciton formation, which is discussed in terms of the high diffusivity of photogenerated electrons.
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