Open the Material Database window by clicking on the Materials button in the main toolbar.
To add a new (n,k) material to the material database, click the “Add” button and select
“(n,k) Material” from the drop down list of material models.
The new material is added to the Material List.
From the Material List table, double click on the name to set the name of the material
to “new nk”.
Under the Material Properties section, the two inputs to the model are the real and imaginary
parts of the refractive index.
Double-click to set the values.
Click “OK” to accept the changes.
Now add a rectangle from the Structure menu and edit the structure.
Under the “Materials” tab when I click on the drop down menu, I can now see the “new
nk” material that I just added as one of the options.
Now to add a new Sampled 3D data material, I have a text file that contains the material
data that I want to import where each row contains the real and imaginary part of the
refractive index for one wavelength.
In this file the first column contains the wavelength in units of microns.
The second and third columns contain the real and imaginary parts of the refractive index.
This is for an isotropic material.
Data can also be specified for an anisotropic material with diagonal anisotropy by importing
a file with 7 columns where there are three columns for each the real and imaginary part
of the data for the x, y, and z directions.
To add the new material, open the Material Database, click “Add”, and select “Sampled
Set the material name.
Click the “Import data…” button.
In the Data Import wizard, click the “Select File…” button to open a file browser where
you can select the text file with the material data.
Under the import settings select “Index” and “Wavelength” with units of “microns”.
Here you can assign which column corresponds to what data.
Here if there are any problems detected in the data you will see a message.
Finally, click “Finish”.
Now in the Material Properties section of the Material Database, you can see the table
of imported data.
If the material data loaded contained 7 columns for anisotropic data, the Anisotropy setting
of the material would automatically show Diagonal anisotropy.
The settings in this table show the default material fitting settings that will be used
for generating a broadband material fit.
There will be more information on material fitting settings in the following unit.
Any new materials added this way are available in the simulation file but won't be added
to the default list of materials in the material database when you open a new file.
Details about adding materials to the default material database can be found on the related
link below this video.