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

• Authors: Sait Yılmaz , Haluk Şafak , Recep Şahingoz , Mustafa Erol
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

photoionization cross section; refractive-index change; hydrogenic impurities; quantum dots

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2010
• Volume: 8
• Issue: 3
• Pages: 438-444

Dates

published

1 - 6 - 2010

online

24 - 4 - 2010

Contributors

author

Sait Yılmaz

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

author

Haluk Şafak

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

author

Recep Şahingoz

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

author

Mustafa Erol

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

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Identifiers

DOI

10.2478/s11534-009-0115-8