Hello!

I’m writing to you to know the origin of the discrepancies I’m having between matlab simulation using Green’s function and FDTD lumerical solution. I’m trying to compare the absorption cross section. I have using Lumerical (sigma_abs=3.4e4 nm2) while matlab (sigma_abs=1.5e4 nm2). Here is my FTDT simulation and then I get sigma_abs using:

sigma_abs=Pabs_tot*sp/out;

where Pabs_tot is the total power absorbed from a Pabs_adv monitor, sp=sourcepower, out=sourceintensity.

Is there anyway to improve the accuracy? test.fsp (276.9 KB)

Thank you in advance