Define New Material on Lumerical‏

Hello,

I want define material with 3D permittivity coefficients like that:


How can I define materials like that?

This can be done by using a matrix transform grid attribute, and there is an example showing how to do this here (under the “Uniform transform” section):
https://kb.lumerical.com/en/index.html?materials_anisotropic_matrix_transformation_grid_attribute.html

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