C++ Library for FE-Simulation

Hello,
I'm looking for a suite of library functions, preferably in C++, for the simulation of
electromagnetic wave phenomena. I looked around and have found numerous C++
libraries for FE-Simulation like e.g. deal.II, getfem, freefem etc, but I don't know if they are of any use. Does anyone have experiences in this field and can give me a hint ?

Any help is appreciated

Regards