Hi again Damian,
I am sorry to ask so much but I still have the same result. I have realized that the project I attached in the first conversation was wrong: I told you that the material ofthe wafer was silicon and it was air. Also I made a mistake telling you that the cylinders were made with air: actually their material was PBG_atom. So I attach again the project (sorry about that). I made the same distribution you told me in your last message but the reflected and the transmitted signals don’t sum a constant factor (‘analyzer_picture.png’). If I change the materials, I check that it also works uncorrectly (reflection is not the initial signal – transmission (‘analyzer_picture_opposite.png’)) but not in the opposite case and that’s weard I think …
Regards,
David.