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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › EME with CVCS for taper; number of subcells › Reply To: EME with CVCS for taper; number of subcells

October 29, 2021 at 11:12 pm
Guilin Sun
Ansys Employee
It can be difficult to have a rule of thumb, since different people may have different expectations for the result and accuracy. My suggestion is to check the overlap of the first few propagation modes. If the overlap is close to 1, it is better. If it is small, such as 0.8 or smaller, it may indicate that more subcells are needed. Of course there is no clear criterion for the smallness, and we do not know how the overlap directly affect the results. You also need to check the current result. If abs(S21) has reached above 0.99, the transmission is quite high in my opinion.

If you want to investigate more, please refer those links:
EME Convergence Testing - An Intuitive Approach
Convergence testing process for EME simulations