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Calculation of linear and nonlinear optical absorption coefficients of a spherical quantum dot with parabolic potential
Scopus
Toplam 147 atıf DOI
In the effective mass approximation, we calculated the binding energy and wave function for the 1s-, 1p-, 1d- and 1f-states of a spherical quantum dot (QD) with parabolic potential by using a combination of quantum genetic algorithm (QGA) and Hartree-Fock-Roothaan (HFR) method. In addition, we also investigated the linear and the third-order nonlinear optical absorption coefficients as a function of the incident photon energy for the 1s-1p, 1p-1d and 1d-1f transitions. Our results are shown that the existence of impurity has great influence on optical absorption coefficients. Moreover, the optical absorption coefficients are strongly affected by the incident optical intensity, relaxation time, parabolic potential and dot radius. © 2009 Elsevier B.V. All rights reserved.
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Linear and nonlinear refractive index changes in spherical quantum dot
Scopus
Havuzumuzda Open Access 13 atıf almış
In this study, refractive index changes associated with in- tersubband transitions in a spherical quantum dot, GaAs/Al xGa 1-xAs, have been theoretically calculated in the presence of impurity. In this regard, the effect of dot radius, stoichiometric ratio, impurity and in- cident optical intensity on the refractive index changes have been in- vestigated for the transitions between higher energy states, i.e., 1s-1p, 1p-1d and 1d-1f. The results show that these parameters have a great influence on the refractive index changes.
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Kurumlar (2)
Aksaray Üniversitesi
Aksaray, Turkey
Selçuk Üniversitesi
Selçuklu, Turkey