Mesh truncation methods for the multiresolution time domain technique

The problem of mesh truncation in the multiresolution time domain (MRTD) technique is discussed in this paper. It is noted that the introduction of material loss; that is necessary for the simulation of a PML medium, renders the MRTD scheme implicit, thus adding a significant computational overhead. Therefore, the use of absorbing boundary conditions that are sufficiently accurate for simulations of planar structures is motivated. An alternative approach to overcome the computational burden that the MRTD modeling of a PML involves, is to develop an FDTD/MRTD interface that permits the FDTD modeling of a PML medium for the truncation of the MRTD mesh.