Dear Handon,

Thank you for reaching out to us!

I am not sure what is exactly your question.

If your structure has electrodes in all four sides of the microcell as shown in the top view of Scheme A, you will need to run a 3D simulation in both FDTD and CHARGE. 2D simulations suppose that the geometry in the normal direction is infinitely uniform.

For the FDTD part, since your structure is periodic, you could also try to use the RCWA solver which in most cases is faster and less time and resources consuming than FDTD.

Is your question whether you can run a 2D simulation in FDTD and then use the results in a 3D CHARGE simulation?

If yes, can you tell me which is exactly the 2D structure that you simulate in FDTD and what monitors and source you are using? Maybe some screenshots could also help.

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Best regards,

Afroditi