ABSTRACT

In previous chapters, we have examined both second-and third-order nonlinearities and some of the effects stemming from these nonlinearities. In all third-order nonlinear processes, the mechanism for nonlinearity was assumed to originate from the instantaneous nonlinear response of the polarization to the incident optical field. In this chapter, we will examine further causes of the origin of the effective nonlinear optical response in some materials. All of these factors are associated with the scattering of light from the materials because of the induced material response.