[Meep-discuss] Negative Permittivity?

Hello, I would like to probe a material with a pulse whose frequency has an epsilon = -.3 + .002i. I have tested the system with an epsilon of 1 and everything works as expected. I changed epsilon like so: (define-param r -.3) (define-param i .002) (set! default-material (make medium

[Meep-discuss] Simulation corner case - zero thickness metal layer

I realize this is abuse of software, but here goes. I've been attempting to simulate WGP structures and looked at the transmission as a function of (rectangular) wire thickness at constant pitch of 200nm (100nm each of wire and gap). If the metal thickness is taken to zero, the transmission does