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Charge confinement and uniformity of stacked InP quantum dots studied by magneto-optical spectroscopy

Maes, Jochen and Hayne, M and Manz, Yvonne M and Schmidt, Oliver G and Eberl, Karl and Moshchalkov, Victor V (2002) Charge confinement and uniformity of stacked InP quantum dots studied by magneto-optical spectroscopy. Physica E: Low-dimensional Systems and Nanostructures, 13 (2-4). pp. 203-207. ISSN 1386-9477

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Abstract

We have studied the magneto-photo luminescence (PL) of triply stacked layers of self-assembled InP quantum dots, For a small separation of the uppermost dot in (he triple stack from the other two closely stacked layers, only one PL peak is observed, whereas for a large separation two PL peaks are present: a broad low-energy and a narrow high-energy peak. We propose a model in which the low-energy peak is associated with the uppermost dot where alignment faults result in enhanced size fluctuations, broadening the line, The narrow high-energy peak originates from charges located in the double stack. In the large separation regime, an increased broadening of the PL line-width indicates that the size fluctuations are augmented as the layer separation is increased from 15 to 30 nm. (C) 2002 Elsevier Science B.V. All rights reserved.

Item Type: Article
Journal or Publication Title: Physica E: Low-dimensional Systems and Nanostructures
Uncontrolled Keywords: self-assembled quantum dots ; InP ; pulsed magnetic fields ; ELECTRON ; GROWTH
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 49842
Deposited By: ep_importer_pure
Deposited On: 20 Sep 2011 09:22
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 19:32
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/49842

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