Greg Baethge
Ansys Employee

Hi ejlee0911,

Our apologies, it seems we missed your question here! As you mentioned, the approach we used is meant for metamaterial used in transmission or in reflection. The span and center are used to compensate the phase accumulated by the light travelling from the source to the metamaterial and then to the monitors used for the calculation.

I think we need to keep this compensation even if the source is within the metamaterial. Since we use the position of the source and monitors, the calculation should still work, but I would suggest to check it.