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Linear and nonlinear optical absorption coefficients and binding energy of a spherical quantum dot
Scopus
Toplam 195 atıf DOI
The binding energy and wavefunctions of the 1s, 1p, 1d and 1f energy states of a spherical quantum dot (QD) with parabolic potential were calculated by using a method which is a combination of the quantum genetic algorithm (QGA) and the Hartree-Fock-Roothaan (HFR) approach. In addition, the linear and the third-order nonlinear optical absorption coefficients based on optical transitions in QDs with and without impurity were calculated. The results show that the parabolic potential has a great effect not only on the binding energies and but also on the optical absorption coefficients. Moreover, the calculated results also reveal that the linear and nonlinear optical absorption coefficients are strongly affected by the existence of impurity and the incident optical intensity. © 2009 Elsevier Ltd. All rights reserved.
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Atıf Yapan Yayın
Computation of relativistic terms in a spherical quantum dot
Scopus
Havuzumuzda 25 atıf almış
We studied a hydrogenic impurity located at the center of a spherical quantum dot with an infinite spherical confining potential and calculated energy levels and wavefunctions using Quantum Genetic Algorithm(QGA) and Hartree-Fock Roothaan (HFR) method. In addition, we investigated the first-order relativistic terms such as the relativistic correction to the kinetic energy, Darwin and spin-orbit interaction term. These terms were calculated using the first-order perturbation theory. The electronic charge density for the Darwin term was carried out from a global operator defined by Hiller, Sucher and Feinberg. The results revealed that the relativistic corrections are important in small dot radii and they should not be neglected to improve the accuracy of calculations. Crown Copyright © 2012 Publishedby Elsevier B.V.Allrights reserved.
Atıf Yapan Makale Bilgileri
Kurumlar (2)
Aksaray Üniversitesi
Aksaray, Turkey
Selçuk Üniversitesi
Selçuklu, Turkey