PROPAGATION OF TRANSVERSELY BOUNDED NONLINEAR ELECTROMAGNETIC PULSES THROUGH PERIODIC MEDIA

Abstract

Nonlinear propagation of optical pulses of finite transverse widths through periodic structures with and without defects is investigated numerically and the subject of investigation is a stack of alternating linear and cubically nonlinear layers of submicron thicknesses is considered. The simulations are based on a modified equation for the pulse envelope and modified boundary conditions where both the diffraction and possible focusing of the pulse are taken into account. The simulations demonstrate an essential influence of defects within the periodic structure on the nonlinear propagation of optical pulses when the carrier frequency is chosen within the stop-band of the structure with the defect.