On Wed, 29 Dec 2010 01:36:54 +0100, Georg Wachter <georgwach...@gmail.com> wrote: > Hello, > > For the simulation of small metal structures with meep, I unfortunately > need > a ridiculously high resolution,
Hi Georg, since we are working with a similar FDTD problem (simulation of small metal structures) and the same program - Meep - would you mind telling a bit more precisely what resolution you need? I am doing some experimentation with scattering from a nanosphere and I have got the impression that simulating accurately a *spectrally* sharper resonance one needs a higher *spatial* resolution, does this make any sense? The only bit of information that I have at the moment regarding this is that if in a Drude model for a metal I decrease the damping, then I need a better spatial resolution to simulate with the same accuracy the scattering at the plasmon resonance. I haven't yet tried with structures different from a sphere. Also, I have noticed that for the same model of the metal (same Drude- Lorentz parameters) a 3d simulation requires higher resolution than a 2d simulation. Right now I get decent results for a 20 nm diameter nanosphere in two dimensions (so it is actually a cylinder) with 0.5 nm resolution, but they do not seem to be enough for 3d (I am trying a calculation with 0.25 nm resolution now). I compare the FDTD scattering efficiencies with Mie theory. The point of all of this is figuring out what is the coarsest resolution which gives decent results, and doing the "actual" simulations with that. Giovanni -- ================================================ Giovanni Piredda Postdoc - AK Hartschuh Phone: ++49 - (0) 89/2180-77601 Fax.: ++49 – (0) 89/2180-77188 Room: E2.062 ---------------------------------------- Message sent by Cup Webmail (Roundcube) _______________________________________________ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
