Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1493202 | Optical Materials | 2016 | 11 Pages |
Abstract
The electron states in a two-dimensional quantum dot ring are calculated in the presence of a donor impurity atom under the effective mass and parabolic band approximations. The effect of an externally applied electric field is also taken into account. The wavefunctions are obtained via the exact diagonalization of the problem Hamiltonian using a 2D expansion within the adiabatic approximation. The impurity-related optical response is analyzed via the optical absorption, relative refractive index change and the second harmonics generation. The dependencies of the electron states and these optical coefficients with the changes in the configuration of the quantum ring system are discussed in detail.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
C.M. Duque, Ruben E. Acosta, A.L. Morales, M.E. Mora-Ramos, R.L. Restrepo, J.H. Ojeda, E. Kasapoglu, C.A. Duque,