Hello physics geniuses, I am wondering if anyone can point me in the direction of a paper or book that describes a nonlinear optics equivalent of the Fresnel equations. The Fresnel equations make boundary condition assumptions which do not account for higher order (nonlinear) terms in the electric susceptibility. There won't be an analytical solution to this, but some numerical simulations will do with some plots, at least to give an experimentalist some idea of how reflection behaves as a function of intensity, angle of incidence, p- or s- polarization, and refractive index. If the above cannot be found, a normal-incidence-only version would be a start and still useful. Thanks!!