The anisotropy effects on the shallow-donor impurity states and optical transitions in quantum dots
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12 AugustÜst veri
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In this work, we theoretically investigate the anisotropy effects on impurity states
and optical transitions in quantum dots. In particular, we investigate the role of the impurity
position on the binding energy and optical response of the ellipsoidal quantum dots. Theoretical
calculations have been carried out using the effective mass approach. The results show
that the impurity binding energies and the optical transitions between the impurity states are
significantly affected by the impurity position and aspect ratio of the ellipsoidal quantum
dots. In general, we conclude that the anisotropy degree of quantum dots can be used as a
tunability parameter for the electronic structure and optical response of the systems based on
the quantum dots.