Hi, all dear meep users, I would like to calculate light transmission in a periodic structure with photorefractive screening nonlinearity, which in details is the refractive index change is proportional to 1/(1+I)(I is light intensity). This is totally different from the Kerr(proportional to square of optical electric fields) or Pockels(linearly proportional to E) nonlinearity, which could be defined as chi2 or chi3. So do you know whether I could do it in Meep and how to write the program? Thanks very much for your kind attention!
Best wishes Yiling
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