I read the Lumerical posts about the periodic structures and about the boundary conditions and I understand them. In order to be able to simulate complex periodic structures I decided to start with something simple: a single gold nanoparticle in an homogeneous medium (let’s say air) with anti-symmetric and symmetric boundaries and record the reflectivity and transmission. I expect to see the plasmon resonance of the gold particle in this monitors.
However, I see in the time monitor that has a ripple structure as can be seen in the next figures.
And in the transmission:
My hypothesis is that it requires more time for simulation or to level down the Autoshoff Level but they are at 1000 fs and 1e-7 respectively. It seems energy is being reflected all the time by the gold sphere. So maybe I’m doing something wrong with the simulation region…
How can this be solved? Thank you very much.