Abstract
AbstractWe have studied the emission spectra and structural properties of double CdSe/ZnSe quantum dot (QD) sheet structures grown by molecular beam epitaxy in order to elucidate the mechanisms of the electronic and strain field interaction between the QD planes. The thickness of the ZnSe barrier separating the CdSe sheets was in the range of 10‐60 monolayers (ML) in the set of samples studied. We have found that coupling between dots in adjacent layers becomes relatively strong in CdSe/ZnSe double layers structures with 25‐27 ML barrier, while it is rather weak when the barrier thickness exceeds 30 ML. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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