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Magnetoluminescence of highly excited InAs/GaAs self-assembled quantum dots

AuthorsPaskov, P. P.; Holtz, P. O.; Monemar, B.; García Martínez, Jorge Manuel ; Schoenfeld, W. V.; Petroff, Pierre M.
Issue Date1-Sep-2001
PublisherAmerican Physical Society
CitationPhysical Review B 62, 7344–7349 (2000)
AbstractWe present magnetoluminescence measurements of InAs/GaAs self-assembled quantum dots (QD’s) at different excitation intensities. By applying high excitation intensities, the magnetic field evolution of the excited-state emission of QD’s is revealed. A splitting of the states with a nonzero magnetic momentum is observed and the in-plane reduced electron-hole mass is determined. The experimental value is found to be in a good agreement with the theoretical predictions based on the eight-band k⋅p model including both strain effect and band nonparabolicity. The density dependence of the diamagnetic shift of the ground-state emission is also studied providing evidence for screening of the Coulomb interaction in QD’s.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.62.7344
Appears in Collections:(IMN-CNM) Artículos
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