CST MWS (Modes in SOI Waveguide)

[rainbow123]

Dear all,

I am trying to simulate a SOI waveguide in CST MWS using time domain solver with dimensions of silicon (220 nm thickn and 500 nm wide)on top of silica.I try to simulate it for frequency range(192-200 THZ).

I am not getting the expected result.What should be the boundary conditions and other settings for getting the correct result.

I have attached the jpg file.Please suggest possible solutions.

Thanks

 

[nomigoraya]

What is your mesh definition?
As your frequency is very high so proper and dense mesh must be used to get accurate results.