Polarization charges effects on optical properties of double ellipsoidal quantum dot

The present study seeks to scrutinize the optical properties of a double ellipsoidal quantum dot (EQD) containing an electron in the presence of a donor impurity. The effect of surface polarization charges due to impurity on absorption coefficients for different values of dielectric constant is investigated. The variational method is used and for different values of ellipticity constant, the linear, nonlinear and total absorption coefficients are calculated as a function of the incident photon energy. The results show that the absorption coefficients of double EQD increase with increases in the ellipticity constant and decrease as polarization charges are considered.