Hi,
I am trying to observe scattering from gold hemispherical nanoparticle (r = 50 nm) placed on substrate. I am modelling substrate using a slab (silicon). I am using scattered field formulation. I am attaching the convergence plot. I am trying to do parametric sweep from 400 nm to 800 nm. What I don't get is if it is converging for shorter wavelengths, why it is not converging (or taking longer) for longer ones. The issue starts beyond 600 nm. Can anyone please help? the system I am using has 16 GB RAM (unfortunately).
Regards
Hamza