Really appreciate your reply. Your work is the most meaningful. However, I still have a few questions.

PEC? (2D materials contain perfect electrical conductors?) How to set it up? Create a 2d material data about conductivity?

Or is there a direct option? I know that refractive index can be calculated from conductivity. I'm going to do a 3d simulation, can I use 2D material data? (PEC)

Are there any examples? ? ?