Refractive index changes of a donor impurity in spherical nanostructures: Effects of hydrostatic pressure and temperature

The effects of hydrostatic pressure and temperature on the linear, nonlinear and total refractive index (RI) changes of a hydrogenic impurity in the center of spherical quantum dot (QD) and quantum anti-dot (QAD) have been investigated. The comparative approach is used for presenting the results of both models. Our numerical results indicate that the RI changes are considerably sensitive to the value of pressure and temperature. It is found that by increasing the pressure and temperature, the RI curves corresponding to QD and QAD are considerably different in shapes and behaviors. Also, our results show that the temperature increasing imposes the opposite effects than the pressure increasing to the both models.