Journal ArticleDOI
Self-organization in growth of quantum dot superlattices.
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TLDR
The growth of multilayer arrays of coherently strained islands self-organizes into a more regular three-dimensional arrangement, providing a possible route to obtain the size uniformity needed for electronic applications of quantum dot arrays.Abstract:
We investigate the growth of multilayer arrays of coherently strained islands, which may serve as ``quantum dots'' in electronic devices. A simple model reproduces the observed vertical correlation between islands in successive layers. However, the arrangement of islands is not simply repeated from layer to layer. Instead, the island size and spacing grow progressively more uniform. In effect, the structure ``self-organizes'' into a more regular three-dimensional arrangement, providing a possible route to obtain the size uniformity needed for electronic applications of quantum dot arrays.read more
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Journal ArticleDOI
A close look on single quantum dots
TL;DR: In this article, a review of the field of interband optical spectroscopy on single semiconductor quantum dots is presented, with a focus on the interband spectra of a single quantum dot.
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Modified Stranski–Krastanov growth in stacked layers of self-assembled islands
TL;DR: In this paper, structural and photoluminescence results on the basis of the extensively studied lattice-mismatched material system Si/Ge were presented on a stack of vertically aligned Stranski-Krastanov grown islands, where the critical thickness for planar growth for all but the initial dot layer is reduced if the thickness of the spacer layer ts is smaller than a certain value t 0.
Journal ArticleDOI
Identifying the forces responsible for self-organization of nanostructures at crystal surfaces
Karsten Pohl,M. C. Bartelt,J. de la Figuera,Norman C. Bartelt,J. Hrbek,J. Hrbek,Robert Q. Hwang +6 more
TL;DR: In this article, the authors identify and measure the ordering forces in a nearly perfect triangular lattice of nanometre-sized vacancy islands that forms when a single monolayer of silver on the ruthenium (0001) surface is exposed to sulphur at room temperature.
Journal ArticleDOI
Three-dimensional Si/Ge quantum dot crystals.
Detlev Grützmacher,Thomas Fromherz,Christian Dais,Julian Stangl,Elisabeth Müller,Yasin Ekinci,Harun H. Solak,H. Sigg,Rainer T. Lechner,E. Wintersberger,Stefan Birner,Václav Holý,Gerrit E. W. Bauer +12 more
TL;DR: An up to now unmatched structural perfection of the quantum dot crystal and a narrow quantum dot size distribution are revealed, indicating a low defect density in the three-dimensional SiGe quantum dot crystals.
Journal ArticleDOI
Optical schemes for quantum computation in quantum dot molecules
TL;DR: In this paper, the authors proposed three methods for entangling quantum states in quantum dot molecules using the resonant energy (Forster-Dexter) transfer mechanism and the biexciton binding energy in a quantum dot molecule.