Reply To: Lumerical help, dielectric slab waveguide

[Marton Ambrus]

Hi Amrita,

Just wanted to ask if the optimisation feature in Lumerical, and the script option within that would allow me to optimise the waveguide's certain parameters until the optimisation reaches a real effective index value with no imaginery parts to it. 
So far, when I run the simulation and it gives me the calculated modes(effective indeces), those have some imaginary part to them which I don't really want. 

And I just wanted to know if there would be a way in the "figure of merit" section to specify a wanted (only real) effective index such as "2.2" and let the optimisation run until it gets there or close to the value.

For your reply, Thank You in Advance!

Marton