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Quantum dot molecules realized with modulated quantum wire heterostructrues

Quantum dot molecules realized with modulated quantum wire heterostructrues

Authors :
Zhu, Qing
Karlsson, Fredrik
Rudra, Alok
Pelucchi, Emanuele
Kapon, Eli
Source :
Physica E. Apr2008, Vol. 40 Issue 6, p1815-1818. 4p.
Publication Year :
2008

Abstract

Abstract: We report on double-quantum dot (QD) molecules realized with modulated quantum wire (QWR) heterostructures by self-limiting growth of AlGaAs alloys in inverted tetrahedral pyramids. The QWR barriers connecting the dots facilitate the tunnel-coupling between the confined carriers. Evidences for the presence of such coupling are provided by conventional micro-photoluminescence measurements and theoretical modeling. Systematically tuning the relative QD sizes in the QD molecules reveals spectral line splitting consistent with the expected level splitting due to carrier hybridization. Prospects for extension of these structures to larger QD superlattices are discussed. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
13869477
Volume :
40
Issue :
6
Database :
Academic Search Index
Journal :
Physica E
Publication Type :
Academic Journal
Accession number :
31562350
Full Text :
https://doi.org/10.1016/j.physe.2007.10.017