Hello, I`m chunho @ south korea.
I have encountered strange result that I cannot find a reason by myself.
I`m calculating a absorption cross-section of Al nanosphere( radius 32nm) in ultraviolet spectrum.
I used TFSF source and default analysis library ‘cross-section’
Resulting scattering cross-section(Sca.) matches well with the Mie calculation, but
Absorption cross-section (Abs.) does not.
The Abs. has about twice larger value than Mie calculation and spectrally fluctuation.
At the very same condition, if I switch the material to dielectric nanosphere with (n.k.)=(3,1).
I got a good result with both of the Abs. and Sca.
Fitting of aluminum using material explorer was good.
Can anyone have an idea of what the problem is?
Below, I attach the link of my fsp files.
It took only a few minutes of time to calculate it.