{"id":320717,"date":"2023-12-04T11:47:51","date_gmt":"2023-12-04T11:47:51","guid":{"rendered":"\/forum\/forums\/reply\/320717\/"},"modified":"2023-12-04T11:47:51","modified_gmt":"2023-12-04T11:47:51","slug":"320717","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/320717\/","title":{"rendered":"Reply To: Question About Simulating Saturable Absorption  (Setting imaginary part of Chi3)"},"content":{"rendered":"<p>&lt;p&gt;Hello,&nbsp;&lt;\/p&gt;&lt;p&gt;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:&lt;br&gt;1. https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360034394734-Advanced-and-custom-optical-material-models-in-FDTD-and-MODE.&lt;\/p&gt;&lt;p&gt;2. https:\/\/optics.ansys.com\/hc\/en-us\/articles\/360034915213-Flexible-Material-Plugin-Framework?source=search&lt;\/p&gt;&lt;p&gt;I hope I helped.&nbsp;&lt;\/p&gt;&lt;p&gt;Kind regards&lt;\/p&gt;&lt;p&gt;Dimitris&lt;br&gt;&nbsp;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-320717","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"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). 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