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Magnetophotoluminescence of stacked self-assembled InP quantum dots

Research output: Contribution to journalJournal article

Published

  • Rik Provoost
  • M Hayne
  • Victor V Moshchalkov
  • Markus K Zundel
  • Karl Eberl
Journal publication date9/08/1999
JournalApplied Physics Letters
Journal number6
Volume75
Number of pages3
Pages799-801
Original languageEnglish

Abstract

We report magnetophotoluminescence measurements of stacked layers of self-assembled InP quantum dots. With a magnetic field applied in the growth direction we have determined the exciton reduced mass from the field dependence of the photoluminescence energy. By applying a magnetic field perpendicular to the growth direction, we have analyzed the spatial confinement of the dots in the growth direction. We observe a large increase in the shift of the exciton energy between 0 and 50 T when the thickness of the GaInP spacer layer between the dots is reduced from 8 to 4 nm. This indicates a decrease in spatial confinement in the growth direction which we attribute to strong electronic coupling between vertically stacked dots. (C) 1999 American Institute of Physics. [S0003-6951(99)03832-2].