We implement off-grid boundary conditions within Yee's finite-difference time-domain (FDTD) method without disturbing the existing uniform mesh or changing the standard FDTD code. Both perfectâ€¦ (More)

The dynamics of wave propagation and interactions in general media is described either by the system of Maxwell's equations, or by the wave equation. This paper focuses on problems modeled by theâ€¦ (More)

In the finite-difference time-domain (FDTD) method, the spatial step is usually chosen to be between 5% and 12.5% of the minimal wavelength of interest. If the boundaries cannot be positioned atâ€¦ (More)

In this paper, a three-dimensional (3-D) PML for the 3-D scalar wave equation is proposed for applications in practical finite difference time-domain schemes such as the time-domain wave-potentialâ€¦ (More)

Time-domain electrodynamics is formally described either by Maxwellâ€™s equations or by the wave equation. In the former case, the system state is described by the field vectors E and H, while theâ€¦ (More)