The photoionization cross section of a hydrogenic impurity in a multi-layered spherical quantum dot


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ŞAHİN M. , Tek F., Erdinc A.

JOURNAL OF APPLIED PHYSICS, cilt.111, 2012 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 111 Konu: 8
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1063/1.4705410
  • Dergi Adı: JOURNAL OF APPLIED PHYSICS

Özet

In this study, we have investigated the photoionization cross section of an on-center hydrogenic impurity in a multi-layered spherical quantum dot. The electronic energy levels and their wave functions have been determined fully numerically by shooting method. Also, we have calculated the binding energy of the impurity by using these energy values. The photoionization cross section has also been computed as a function of the layer thickness and normalized photon energies. We have discussed in detail the possible physical reasons behind the changes in the binding energies and photoionization cross section. It is observed that both the binding energies and the photoionization cross sections depend strongly on the layer thickness and photon energies. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705410]