Scattering from truncated cylinders with a mixed 2-D/3-D domain decomposition scheme

We present a spectral approach to effectively estimate radiation losses from 2-D slab photonic crystals. The method is based on a plane wave decomposition of the incident propagating mode inside the slab and the construction of a self-consistent Kirchhoff equivalent source (on the slab surface) which accounts for the actual radiation modes excited in the crystal. The proposed modelling strategy is combined with a domain decomposition method, viz, linear embedding via Green's operators.