Hello, I'm modeling light propagation/scattering in biological cells. I've been using MEEP for a while and feel like I have an OK handle on the pieces I've been using. I am using the c++ libraries with my own code (the libraries I'm using aren't current, if that turns out to be important).
However, I'd like to consider the effects of absorption in these cells and their organelles. I think I understand that the way to do this is to specify conductivity values in addition to epsilon. However, in my field we're much more accustomed to thinking about the absorption of photons by materials/tissues rather than considering this from the view of the EM field. So, I believe I need to attack this from the perspective of taking observed transmission spectra, maybe even absorption cross-sections, etc. and translating this into a meaningful conductivity parameter (sigma, right?). I apologize for bringing a theoretical question instead of a programming question to the mailing list, but I am struggling to understand how to proceed and hope that someone could help clarify things for me, or at least point me in the right direction to study and learn it on my own. I appreciate any help that can be provided.
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