Hello everybody!
I'm trying to perform simulations in order to obtain the nonlinear response
of a given geometry. Currently, I'm "stretching muscles" by using the
*mie.py* example code given in the documentation. Over this code I'm adding
some lines in order to obtain the nonlinear response. Previously, I
incorporated the third-order susceptibility [image: \chi^{(3)}] such
as *mp.Medium(index=n_sphere,
chi3=10**-3). *Then, I added the corresponding fluxes regions as is
commented in the example *3rd-harm-1d.py* also given in the documentation.
However, I need several things to improve my code.
1) I want to model a metal nanoparticle, namely, of gold or silver
material. I do not know if by importing the gold material such as *from *
meep.materials* import *Au_JC_visible as Au, the third-order susceptibility
is either regarded.
2) How to include a complex chi3, that is, measurements of [image:
\chi^{(3)}] are often to be reported as a complex quantity at certain
wavelength.
3) How can I compute an effective third-order susceptibility in the medium
plus metal nanoparticle.
I hope somebody could help me.
Best regards,
Alfredo.
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