Nonlineartmm

Transfer-matrix method (TMM) is powerful analytical method to solve Maxwell equations in layered structures. However, standard TMM is limited by infinite plane waves (e.g no Gaussian beam excitation) and it is only limited to linear processes (i.e calculation of second-harmonic, sum-frequency, difference-frequency generation is not possible). The aim of this package is extand standard TMM to include those features. The physics of those extensions are described in the follwoing publications, first extends the standard TMM to nonlinear processes and the second extends to the beams with arbritary profiles.