third order nonlinear index of refraction and absorption coefficient of Zinc Oxide quantum dot

Abstract

In this research analytical and numerical calculations have been made to identify the dependence of third order nonlinear refractive index and absorption coefficient on optical laser intensity and transition energy. Analytical expressions for the thirdorder nonlinear absorption coefficients and refractive index changes are obtained by using compact density matrix approach. The obtained result indicates that both third order NL absorption coefficient and refractive index changes experience a blue shift by increasing the transition energy. Moreover high laser intensity induces a pronounced magnitude of third order NL absorption coefficient and refractive index changes.