Beam Gaussian and FDTD

Hi,
Can anyone tell me how to implmeent Gaussian beam in FDTD Method?

hi, surf ieee papers and you find some. I remember a paper solving the scattering of a Gaussian beam incident on a pec edge with FD. It was not a time domain problem. but It should not be hard if you have a FDTD code. I have not done this myself. especially the "complex source point" method may help a lot.

I want some C codes for implement Gaussian Pulse to a 2D FDTD problem. Are there anyone used C codes before?

These are for MATLAB;

B_eff = fmax;
To = 8/B_eff;
T_shift = To/2;

These are for my project, you must change some necessary values on these codes.