Yılmaz, SaitŞafak, HalukŞahingöz, RecepErol, Mustafa2020-03-262020-03-262010Yılmaz, S., Şafak, H., Şahingöz, R., Erol, M., (2010). Photoionization Cross Section and Refractive-İndex Change of Hydrogenic Impurities in a CdS-SiO2 Spherical Quantum Dot. Central European Journal of Physics, 8(3), 438-444. Doi: 10.2478/s11534-009-0115-81895-1082https://dx.doi.org/10.2478/s11534-009-0115-8https://hdl.handle.net/20.500.12395/25157In 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.en10.2478/s11534-009-0115-8info:eu-repo/semantics/openAccessPhotoionization cross sectionRefractive-index changeHydrogenic impuritiesQuantum dotsArticle83438444N/AWOS:000277004300020Q3