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Electron and hole confinement in stacked self-assembled InP dots of different sizes

Hayne, M and Maes, Jochen and Manz, Yvonne M and Schmidt, Oliver G and Eberl, Karl and Moshchalkov, Victor V (2001) Electron and hole confinement in stacked self-assembled InP dots of different sizes. Physica Status Solidi B, 224 (1). pp. 31-35. ISSN 0370-1972

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Abstract

We report photoluminescence (PL) measurements on doubly-stacked Layers of self-assembled InP quantum dots. The amount of material in the lower layer is kept constant. whilst in the upper layer it is systematically reduced. Zero-field PL measurements demonstrate that for each stack only one dot (the largest one) is occupied by an electron, and that when the amount of InP in both layers is the same the upper dots are larger. The behaviour of the holes, which art: confined by strain in the structure. is revealed by high field (50 T) PL experiments. The holes are found to be increasingly localised to a smaller and smaller volume as the size of the dots in the upper layer is reduced.

Item Type: Article
Journal or Publication Title: Physica Status Solidi B
Uncontrolled Keywords: QUANTUM DOTS
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 49845
Deposited By: ep_importer_pure
Deposited On: 20 Sep 2011 09:26
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 19:32
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/49845

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