Comparison of a Few Transparent Boundary Conditions for Finite-Difference OpticalMode-Solvers

摘要

Various transparent boundary conditions are investigated for finite differencemode solvers, beyond the classical condition of a uniform exponential decrease for the field. A simple but efficient improvement is proposed with no extra numerical cost. High order TBC's also exist, that lead to even better results but at the cost of more numerical difficulties. Results are given within both the Method of Lines and a 2-dimensional finite difference technique.