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Ansys Learning Forum Forums Discuss Simulation Photonics MODE mesh override region Reply To: MODE mesh override region

Guilin Sun
Ansys Employee

This is because by default the mode finding begins from the largest neff, which is mostly inside metal.

You can uncheck "use max index", and specify the original neff data in "n" from the case without the metal.

you may also need to set more number of trial modes, since even though you set the "n" at the neff from previous result, it may begin from larger value.