Dimitris Polyzos
Ansys Employee

Hello Muhammad,

I reckon you are correct regarding the material distinction. If your override mesh is at the scale of 1 nm and as I can see the thickness you are using is in the order of 0.345 nm then you will not be able to see any difference in the material. Even if you decrease your mesh to 0.05 nm I believe that you are reaching to a limitation point of meshing. You can use the scale factor instead, however it will be difficult to distinguish the material structure for such tiny thickness.

A lot of information regarding the colorbar limits you can read this article:d Understanding frequency domain CW normalization. The unity 1 value you want to obtain in your colorbar, is normalized as the peak amplitude of the injected E-field which is enhanced in dielectric, however I reckon that your field components will be complex. 

Please refer to Units-and-normalization-conventions-in-Lumerical-solvers for more information regarding the normalization.

I hope I helped. Please feel free to contact me for further information.

Kind regards

Dimitris