Electron and hole confinement in stacked self-assembled InP quantum dots

Hayne, M and Provoost, Rik and Zundel, Markus K and Manz, Yvonne M and Eberl, Karl and Moshchalkov, Victor V (2000) Electron and hole confinement in stacked self-assembled InP quantum dots. Physical review B, 62 (15). pp. 10324-10328. ISSN 1550-235X

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Abstract

We report photoluminescence measurements on stacked self-assembled InP quantum dots in magnetic fields up to 50 T. For triply stacked layers the dots become strongly coupled when the layer separation is 4 nm or less. In contrast, doubly stacked layers show no sign of coupling. We explain this puzzling difference in coupling by proposing a model in which the holes are weakly confined in the GaxIn1-xP layers separating the layers of dots, and are responsible for the coupling. Since only one such intervening layer exists in the doubly stacked dots coupling is excluded. Our model is strongly supported by the exciton masses and radii derived from our experimental results, and is consistent with available theory.

Item Type: Journal Article
Journal or Publication Title: Physical review B
Additional Information: © 2000 The American Physical Society
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 49849
Deposited By: ep_importer_pure
Deposited On: 20 Sep 2011 08:30
Refereed?: Yes
Published?: Published
Last Modified: 27 Feb 2020 01:36
URI: https://eprints.lancs.ac.uk/id/eprint/49849

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