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Proceedings Paper

Controlling the optical properties of quantum dots and nanocrystals using size, composition and strain
Author(s): Garnett W. Bryant; J. G. Díaz; M. Zieliński; W. Jaskólski
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Paper Abstract

We exploit atomistic tight-binding theory to describe the effects of dot size, composition, internal strain and applied strain on the confined states in nanocrystals and quantum dots. Both types of strain are critical, so we include the local strain and the externally imposed strain on an equal footing via an atomistic valence force field approach. A tightbinding model including an sp3s*d5 orbital model and spin-orbit effects is used. Several examples are discussed, including GaAs nanocrystals, InP nanocrystals under pressure, and core-shell nanocrystals, to highlight the importance of using atomistic models, extending tight-binding models to include d states, and having both internal and applied strain.

Paper Details

Date Published: 2 February 2007
PDF: 11 pages
Proc. SPIE 6481, Quantum Dots, Particles, and Nanoclusters IV, 648102 (2 February 2007); doi: 10.1117/12.697327
Show Author Affiliations
Garnett W. Bryant, National Institute of Standards and Technology (United States)
J. G. Díaz, National Institute of Standards and Technology (United States)
M. Zieliński, Univ. Mikołaja Kopernika (Poland)
W. Jaskólski, Univ. Mikołaja Kopernika (Poland)


Published in SPIE Proceedings Vol. 6481:
Quantum Dots, Particles, and Nanoclusters IV
Kurt G. Eyink; Diana L. Huffaker; Frank Szmulowicz, Editor(s)

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