MODELING OF LIGHT PROPAGATION THROUGH STEP-LIKE DISCONTINUITIES IN SLAB DIELECTRIC WAVEGUIDES

摘要

One-way light propagation through a steplike discontinuity of dielectric-slab waveguide is simulated by using the finite-difference beam-propagation method (FD-BPM) and the Green's function method. The validity of the slowly varying envelope approximation in modeling of the total field distribution and the radiation-field distribution is analyzed.