I want to determine the SPR of a 40nm gold film on glass substrate over which 4nm of Titanium film is deposited by evaluating reflection and transmission as a function of source angle. I want to do parameter sweep over the source incidence angle. This problem is similar to one of the open source lumerical example problem. Here is the link to the similar problem using silver in 2D: https://kb.lumerical.com/en/sp_spr_2d.html
Just that I am doing the same in 3D with gold film instead of silver. The problem is that the electric fields are not stabilizing and the final autoshutoff value is nowhere near to the desired minimum, i.e., 10^-5. I am using Bloch boundary condition as I am doing angled incidence analysis. The simulation file has been attached for reference.With_FDTD_p0.log (9.8 KB)
With_FDTD…fsp (255.8 KB)
Please somebody help.