Weighted index method for planar 1-D photonic crystals

摘要

An analytical approximate method is introduced for obtaining wave vector diagrams for planar 1-D photonic crystal. Based on the best separable wave solution, a variational formula provides the best estimate to the propagation constant. The wave vector diagram and the wave profile are obtained for a typical PCVD technology. Due to the iterative nature of the method, any wave amplitude nonlineariry can also be modeled easily.