Efficient 3D finite difference frequency-domain modeling of scattering in lossy half-space geometries

A novel 3D Matlab-based FDFD model has been introduced and tested, and an example of simulated scattered E-field is presented. The modeled results compare well to results from other models. This model can easily handle complicated geometry including rough surfaces. The required CPU time is relatively fast at about 1 hour for the typical grid size (90x90x90). The iterative LGMRES method without preconditioner works well and converges quickly.