Single mode channel burried waveguide




I have a very basic simulation that I am stuck in. I have a singe TE mode burried channel waveguide and I am injection a single TE mode but I don’t get single TE mode in my waveguide. But if I change the positions of simulation region I start getting TE at some settings. May I know whats reason for that. Here is simulation file rib_wg.lms (390.9 KB)



Hi @nouman.zia

In the attached simulation file, the mode recorded in the monitors seem to be a fundamental mode:

Can you please elaborate on how you were seeing multimodes?