Extension of standard transfer-matrix method for three-wave mixing for plasmonic structures

Fast and accurate modeling of three-wave mixing processes in arbitrary stratified medium has significant practical and scientific importance. Several attempts to generalize transfer-matrix method (TMM) for nonlinear interactions have been made; however, none suits for easy-to-use modeling of plasmonic structures which requires oblique angle of incidence, p-polarization and minimal approximations. In this work, an easy-to-use extension to standard TMM is proposed. The proposed method is used to study the strength of unconventional plasmonic enhancement of second harmonic generation.