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Excitons in self-assembled quantum ring-like structures
Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE).
Ctr. for NanoScience and Sektion P., Ludwig-Maximilians Universität, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
Ctr. for NanoScience and Sektion P., Ludwig-Maximilians Universität, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
Ctr. for NanoScience and Sektion P., Ludwig-Maximilians Universität, Geschwister-Scholl-Platz 1, 80539 Munich, Germany.
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2000 (English)In: Physica. E, Low-Dimensional systems and nanostructures, ISSN 1386-9477, E-ISSN 1873-1759, Vol. 6, no 1-4, 510-513 p.Article in journal (Refereed) Published
Abstract [en]

A remarkable morphological change of self-assembled InAs quantum dots takes place during growth if a pause is introduced after overgrowing the dots with a few nm of GaAs. Atomic force microscopy indicates that the shape of the dots changes lens-like to ring-like. We report here the results of capacitance and interband transmission experiments on such ring-like structures embedded in a GaAs matrix. In particular, we compare the electronic properties of conventional dots with those of the rings. Significant changes are found which qualitatively support a quantum ring model. (C) 2000 Elsevier Science B.V. All rights reserved.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2000. Vol. 6, no 1-4, 510-513 p.
Keyword [en]
self-assembly, quantum dots, rings
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hh:diva-18782DOI: 10.1016/S1386-9477(99)00096-XISI: 000085770600121Scopus ID: 2-s2.0-0034138738OAI: oai:DiVA.org:hh-18782DiVA: diva2:539825
Available from: 2012-07-05 Created: 2012-06-25 Last updated: 2012-07-05Bibliographically approved

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