Linear and nonlinear optical properties of a modified Gaussian quantum dot: pressure, temperature and impurity effect

In this paper, the effect of pressure, temperature and impurity on the energylevels, binding energy, linear and nonlinear optical properties of a modified Gaussianquantum dot are studied. In this regard, the finite element method is employed to solvethe single electron Schrodinger equation in the effective mass approximation with andwithout impurity at the center of the dot. In addition, the energy levels, the wavefunctions, biding energy, absorption coefficients and refractive index changes fordifferent pressures and temperatures are calculated. The results show that the energylevels decrease by increasing pressure and increase by increasing the temperature forboth, with and without impurity, situations. Also, in the presence of impurity, therefractive index changes are greater than the case without impurity and shift to higherenergies. Furthermore, by increasing the pressure, the refractive index changes increaseand shift to lower energy for both with and without impurity cases. By increasing thepressure and temperature the absorption coefficients decrease and shift to lower energyfor all with and without impurity cases