Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10642292 | Physica E: Low-dimensional Systems and Nanostructures | 2005 | 8 Pages |
Abstract
The optical-absorption spectra associated with transition between the ground state of a hydrogenic donor impurity to the second conduction levels in the presence of a magnetic field has been calculated for spherical CdSe quantum dot (QD) with infinite potential confinement, using a variational method and a perturbation method within the effective-mass approximation. We have found that as a consequence of the scaling laws, the absorption coefficient varies systematically as a function of QDs size. The application of the magnetic field may hinder the absorption coefficient of an on-center impurity and displace the threshold energy towards high energy if γ>1/R2 and towards low energy if γ<1/R2 for the 1s-2pâ transition. For all values of the magnetic field, the threshold energy of the transition 1s-2p+ is displaced towards high energy.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
A. Didi Seddik, I. Zorkani,