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Photoionization cross section and refractive-index change of hydrogenic impurities in a CdS-SiO2 spherical quantum dot

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Central European Journal of Physics

Abstract

In this study, we calculate the photoionization cross section and refractive-index change of an on-center hydrogenic impurity in a CdS-SiO2 spherical quantum dot. In numerical calculations, both the finite- and infinite-confinement cases are considered and a variational scheme is adopted to determine the energy eigenvalues for the impurity. The variations of the photoionization cross section with the dot radius, the refractive-index change, and the normalized photon energy are investigated, and the effect of the potential-barrier height on the cross section is discussed. The results obtained show that the photoionization cross section and the refractive-index change in CdS-SiO2 spherical quantum dots are sensitively dependent on the incident optical intensity and on the dot sizes.

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Authors and Affiliations

  1. Faculty of Literature and Sciences, Department of Physics, Bozok University, 66200, Yozgat, Turkey

    Sait Yılmaz, Recep Şahingoz & Mustafa Erol

  2. Faculty of Literature and Sciences, Department of Physics, Selçuk University, 42075, Konya, Turkey

    Haluk Şafak

Authors
  1. Sait Yılmaz
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  2. Haluk Şafak
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  3. Recep Şahingoz
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  4. Mustafa Erol
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Correspondence to Sait Yılmaz.

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Yılmaz, S., Şafak, H., Şahingoz, R. et al. Photoionization cross section and refractive-index change of hydrogenic impurities in a CdS-SiO2 spherical quantum dot. centr.eur.j.phys. 8, 438–444 (2010). https://doi.org/10.2478/s11534-009-0115-8

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  • DOI: https://doi.org/10.2478/s11534-009-0115-8

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