Efficient DGTD Method with LTS and IWDL Formulation for Multi-Scale EM Scattering

This work presents a third-order local time stepping (LTS) method along with an efficient imposition source strategy applied to the discontinuous Galerkin time domain (DGTD) method in order to improve execution time while preserving precision. This formulation was applied to solve a complex multiscale electromagnetic (EM) scattering problem. Numerical results showed that the proposed method maintains the precision of the standard DGTD with global time stepping (GTS) and reduced the time execution by about 80%.