Thank you a lot for the answer! But I still have a question. Firstly, the additional issue I face is that the WG I simulate with MODE is oriented along the x-axis (injection x-axis). To use overlap, I need the elliptical beam in the Y-Z plane. Of course, I can rearrange the WG geometry, but I wanted to find out if there is a way to generate an elliptical beam in the Y-Z plane.
Concerning zbf, it seems that the zbf export works in a way that the resulting field distribution is in the X-Y plane. Actually, I tried this approach by following the tutorial: "Import Source in Ansys Lumerical FDTD" (https://courses.ansys.com/index.php/courses/lumerical-fdtd-sources/lessons/import-source-in-ansys-lumerical-fdtd-lesson-7/). I defined the source and the monitor so that x is the injection direction and saved the field from the monitor to the zbf. However, when I import it to the DECK in MODE for the overlap analysis, the field is in the X-Y plane.
Is there is a way to get field in zbf in Y-Z plane ?
Thank you in advance!
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