The effects of the hydrostatic pressure and temperature on binding energy and optical properties of a donor impurity in a spherical quantum dot under external electric field


Kirak M., Altinok Y., Yilmaz S.

JOURNAL OF LUMINESCENCE, vol.136, pp.415-421, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 136
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jlumin.2012.12.026
  • Journal Name: JOURNAL OF LUMINESCENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.415-421
  • Keywords: Quantum dot, Hydrostatic pressure, Temperature, Impurity, Nonlinear optics, PHOTOIONIZATION CROSS-SECTION, INTENSE LASER FIELD, HYDROGENIC IMPURITY, MAGNETIC-FIELD, DIAMAGNETIC SUSCEPTIBILITY, PARABOLIC CONFINEMENT, WELL WIRE, STATES, GAAS, ABSORPTION
  • Yozgat Bozok University Affiliated: Yes

Abstract

The effects of the hydrostatic pressure and temperature on the electronic and the linear and nonlinear optical properties (i.e., absorption coefficients and refractive indices) are investigated in a spherical quantum dot in the presence of the electric field. The energy levels and wave functions are calculated using the variational method within the effective-mass approximation. The results show that these external factors have a significant effect not only on the binding energy of the donor impurity but also on the optical characteristics of the system. Moreover, it is found that the total absorption coefficient is strongly affected by the existence of impurity, the incident optical intensity, and relaxation time. Published by Elsevier B.V.