Hi, I have never used this before so hope this is the right place and format.
I am a new PhD student that inherited a lumerical model for a waveguide. I rewrote it to understand it and in 2D it runs well and I see sensible results (transmission~70% and a nice E-field distribution).
However I cant replicate this result in 3D. It runs without error, however there is no transmission and the E-field shows the energy dispersing immediately with no waveguiding.
Are there any obvious problems I should be aware of or common issues?
I can give a more detailed account, but dont know what is relevant.