Reply To: Quasi Normal Mode method to estimate Green’s function

[Guilin Sun]

In principle, as long as the physics can be described by Maxwell's equations, FDTD should be able to give correct results of E/H. As for other quantities, as long as they are derived from E/H, one should be able to get. For example, the complex time frequency with proper interpretation, one can get it:
Quality factor calculations for a resonant cavity
The decay constant may be interpreted to imaginary frequency.
We have no related examples to Quasi Normal Mode analysis, unfortunately.