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Electronic Properties of Quantum-Dot Molecules

Published

Author(s)

W Jaskolski, M Zielinski, Garnett W. Bryant

Abstract

We investigate the electronic structure of several double quantum dot systems: (I) hetero-dot artificial molecules built from two CdS chemically synthesized nanocrystals and (ii) two vertically stacked pyramidal self-organized InAs/GaAs quantum dots. The calculations are performed using the empirical tight-binding approach. The results of calculations show significant coupling between the nanocrystals that form quantum-dot molecule. When two quantum dots are close enough, the strong coupling can split and reorder energy levels, change state symmetries and make substantial changes in optical spectra. Formation of double-dot states having bonding and antibonding character by analogy to diatomic molecules is shown.
Citation
Physica E-Low-Dimensional Systems & Nanostructures
Volume
Vo. 17
Issue
No. 1-4

Keywords

electronic structure, nanocrystals, quantum dots

Citation

Jaskolski, W. , Zielinski, M. and Bryant, G. (2003), Electronic Properties of Quantum-Dot Molecules, Physica E-Low-Dimensional Systems & Nanostructures (Accessed March 3, 2024)
Created April 1, 2003, Updated February 17, 2017