Amrita Pati
Ansys Employee

Hi Ajay, 

That is correct, the FDTD is a time domain algorithm, but at the end of the simulation, the DFT monitors convert the time domain results into frequency domain results using Fourier transform, so you see the electric/magnetic field results for different wavelengths/frequencies. If you would like to see the evolution of electric field over time using a time domain monitor. Could you explain a little bit more what exactly is the metric you are looking for? You may also share a reference plot/article. Thank you!

Regards,
Amrita