Discussion Forum

Hello all,

I am a slightly new user to COMSOL and I am trying to model Mie Scattering off of silver nanoparticles (AgNPs). When computing the scattered field for a single AgNP, the resulting E field shows up beautifully and I can obtain many useful parameters for my current project. However, when trying to compute the scattered field for two AgNPs separated by a distance of 2 nm, the results are quite unusual.

1) A plot of the scattered E field in the results section shows only the field in the PMLs and the nanoparticles, not in the surrounding medium (which is defined to be water).

2) The E field around my AgNPs is very small and it appears the highest E field actually occurs at the PML (I think this indicates I have an intense scattering problem?).

Any ideas as to why I am unable to view the electric field surrounding the AgNPs and as to why the results for the single AgNP and two AgNPs are so different?

I am sure that I am just doing something rather idiotic (I am a chemist, not a physicist :-) )but I have been unable to resolve the issue on my own. I have attached both of my models, one for a single AgNP and the other for two AgNPs.

Any and all help is gratefully appreciated!

Cheers,
Kevin