gell
Junior Member level 2
rsoft fdtd
Recently, I'm using Rsoft's FDTD to simulate some dispersive media, that is, n+ki. I find when k is very large, suppose, 2+11i, the FDTD will scater. So I want to make sense of the grid size and time step. So far, I define grid size and time step based on lossless media, that is, grid size<lambda/10, time step<grid size/2. For dispersive media, is there any change for time step or grid size? Is there any rule for this? Could anyone help me? Many thanks.
Recently, I'm using Rsoft's FDTD to simulate some dispersive media, that is, n+ki. I find when k is very large, suppose, 2+11i, the FDTD will scater. So I want to make sense of the grid size and time step. So far, I define grid size and time step based on lossless media, that is, grid size<lambda/10, time step<grid size/2. For dispersive media, is there any change for time step or grid size? Is there any rule for this? Could anyone help me? Many thanks.