Ansys Learning Forum Forums Discuss Simulation Photonics Question About Simulating Saturable Absorption (Setting imaginary part of Chi3) Reply To: Question About Simulating Saturable Absorption (Setting imaginary part of Chi3)

Dimitris Polyzos
Ansys Employee

Hello, 

You are correct, the imaginary part of the existing models is not included. However, there is a workaround in order to include the absorption characteristic of a material. An option would be to create your own material model (check link #2). I have to let you know that it is quite an advanced feature that requires a very good understanding of the FDTD method as well as experience in C++ programming, meaning that it will require recompiling the C++ code, and changing the update equations. Please refer to the following links:
1. https://optics.ansys.com/hc/en-us/articles/360034394734-Advanced-and-custom-optical-material-models-in-FDTD-and-MODE.

2. https://optics.ansys.com/hc/en-us/articles/360034915213-Flexible-Material-Plugin-Framework?source=search

I hope I helped. 

Kind regards

Dimitris
  

 

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