TITLE

A growth pathway for highly ordered quantum dot arrays

AUTHOR(S)
Liang, Jianyu; Luo, Hailin; Beresford, Rod; Xu, Jimmy
PUB. DATE
December 2004
SOURCE
Applied Physics Letters;12/13/2004, Vol. 85 Issue 24, p5974
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
To realize the desired zero-dimensional behavior of a quantum dot ensemble, the ability to fabricate quantum dots with a high packing density and a high degree of size, shape, and spacing uniformity is crucial. Here we report highly ordered InAs nanodot arrays grown by molecular-beam epitaxy on nonlithographically nanopatterned GaAs. Approximately 20 billion dots are grown in a 1 cm2 area with the smallest size dispersion ever reported and forming a lateral superlattice in hexagonal dense packing form. These techniques presage a pathway to controlled growth of periodic quantum dot superstructures, which offer macroscopic spatial coherence in the interaction of quantum dots with radiation.
ACCESSION #
15331848

 

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