Thank you for the quick reply! Yes, I think I would need to try the scripting method as well.. because truly the waveguide that I have to simulate has layers (cladding-core-cladding-core-cladding)... It's just my idea was that it would be easier to simulate 3 layers of the 5, and when I'm happy with the design just copy a core-cladding layer below the 3 layers, essentially making the 5 layers. The method you described above seems very good for finding just the core thickness, but unfortunately I need to calculate with the claddings in the structure.
let me attach the research paper that has the design I'm trying to simulate, so you can see better what I'm trying to describe.
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