Magnetoluminescence of highly excited InAs/GaAs self-assembled quantum dots
2000 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 62, no 11, 7344-7349 p.Article in journal (Refereed) Published
We 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.
Place, publisher, year, edition, pages
2000. Vol. 62, no 11, 7344-7349 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-47582DOI: 10.1103/PhysRevB.62.7344OAI: oai:DiVA.org:liu-47582DiVA: diva2:268478