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Research output: Contribution to Journal/Magazine › Journal article › peer-review
<mark>Journal publication date</mark> | 9/08/1999 |
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<mark>Journal</mark> | Applied Physics Letters |
Issue number | 6 |
Volume | 75 |
Number of pages | 3 |
Pages (from-to) | 799-801 |
Publication Status | Published |
<mark>Original language</mark> | English |
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].