Reply To: Question about FDTD simulation

[rnjstjrrn98]

This metamaterial is designed to absorb two frequencies in different bands via surface plasmon resonance.
As far as I know, the dielectric constant of the dielectric varies with frequency.
The simulation was conducted by substituting a dielectric constant suitable for one of the two frequencies mentioned earlier, and the absorption rate at this frequency is lower than that obtained through actual manufacturing and experiments.

 

According to actual experiments, the right pick should come down to 0.1 level.

 

I wonder why these results are happening in simulations.