期刊
OPTICS COMMUNICATIONS
卷 282, 期 19, 页码 3999-4004出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2009.06.043
关键词
Spherical quantum dot; Binding energies; Oscillator strength; Linear and third-order nonlinear absorption coefficients; QGA and HFR method
类别
资金
- Selcuk University BAP office
The electronic structure and optical properties of one-electron Quantum Dot (QD) with and without an on-center impurity were investigated by assuming a spherically symmetric confining potential of finite depth. The energy eigenvalues and the state functions of QD were calculated by using a combination of Quantum Genetic Algorithm (QGA) and Hartree-Fock Roothan (HFR) method. We have calculated the binding energy for the states 1s,1p,1d,1f, oscillator strengths, the linear and third-order nonlinear optical absorption coefficients as a function of the incident photon energy and incident optical intensity for the 1s-1p, 1p-1d and id-If transitions. The existence of the impurity has great influence on the optical absorption spectra and the oscillator strengths. Also we found that the magnitudes of the total absorption coefficients of the spherical QD increase for transitions between higher states. (C) 2009 Elsevier B.V. All rights reserved.
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