Hi smzia, 

I am currently trying to figure something out regarding transmission "T" in FDTD and I came upon your discussion here, and I saw that in one of your replies you mentioned that "if T is electic field then, Abs^2(T) will visulaize power transmission. As , P=E^2." Is there any way you could explain to me, or point me in the right direction, as to how P = E^2? This would be of great help to me. Thank you!