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Proceedings Paper

Coupling effects in quantum dot molecules
Author(s): K. G. Dvoyan; A. A. Tshantshapanyan; D. B. Hayrapetyan; E. M. Kazaryan; Zh. M. Wang; G. J. Salamo
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Paper Abstract

The electronic states and coupling effect in the laterally stacked symmetric and asymmetric quantum-dot-molecules (QDMs) are studied. The formed potential of QDM is approximated with parabolic and modified Pöschel-Teller (MPT) potentials. It is shown that the coupling criterion of quantum dots (QDs) is the energy levels split due to the tunneling effect. In the case of the asymmetric QDM the electron relocalization step-like behavior is revealed, while in the symmetric case it is principally impossible. The obtained results for parabolic and modified Pöschel-Teller potential confinements are compared. The formation of energy levels split for a given range of values of energy (coupling criterion) as a consequence of the finiteness of the confinement potential is revealed for the case of modified Pöschel-Teller potential approximation.

Paper Details

Date Published: 25 January 2012
PDF: 10 pages
Proc. SPIE 8414, Photonics and Micro- and Nano-structured Materials 2011, 841409 (25 January 2012); doi: 10.1117/12.923564
Show Author Affiliations
K. G. Dvoyan, Russian-Armenian (Slavic) Univ. (Armenia)
A. A. Tshantshapanyan, Russian-Armenian (Slavic) Univ. (Armenia)
D. B. Hayrapetyan, Russian-Armenian (Slavic) Univ. (Armenia)
E. M. Kazaryan, Russian-Armenian (Slavic) Univ. (Armenia)
Zh. M. Wang, Univ. of Arkansas (United States)
Univ. of Electronic Science and Technology of China (China)
G. J. Salamo, Univ. of Arkansas (United States)

Published in SPIE Proceedings Vol. 8414:
Photonics and Micro- and Nano-structured Materials 2011
Rafael Kh. Drampyan, Editor(s)

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