I am going through the Mie 3D tutorial to understand the calculations for extinction of a nanoparticle. When using mie_analysis_3d.lsf to plot the scattering and absorption cross sections, I get sharp peaks in the curve. I expect it to be more smooth. Does anyone have any idea of why this would be? I tried increasing the simulation time from 50fs to 75fs, but the results are identical. I also tried adjusting the material parameters for a better fit. I hope that someone could help me better understand this issue.
I attached .jpeg images of my results below.