On Mar 29, 2008, at 8:09 AM, Mani Chandra wrote: > Hi Steven, > Which is a better way to find the flux through a plane for a source > with a single frequency? > The following functions are in the C++ interface:- > 1)Using add_dft_flux_plane (using nfreq=1) (or) > 2)Using add_flux_plane > > I tried using both of them and I did a plot of the flux through a > plane vs time and add_dft_flux_plane gave a quadratic curve which is > because this is integrated with time, right?. But the add_flux_plane > seems to give an entirely different plot in which the flux seems to > essentially constant but with minor fluctuations as in it keeps > increasing and decreasing by a very minor amount but it essentially > seems to be constant. Could you please explain that?
add_flux_plane just implements a more efficient way to get the instantaneous Poynting flux at every time step; it doesn't do any time integration whatsoever. So, it should be an oscillating function (for real fields) or a roughly constant function (for complex fields at a ~constant frequency), totally different from dft_flux_plane. Steven _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
