On Nov 25, 2008, at 10:34 AM, Christoph Statz wrote: > when i place a source within an area of negative epsilon, some parts > of the E-field result to nan. > This leads to complete black png pictures. > a) Probably i'm not getting the point. Is this normal behaviour? > b) Is there a posibillity to change this?
If you have a frequency-independent negative-epsilon region, then the FDTD method is unstable and the fields will blow up in general. The way around this, if you want a negative epsilon at some frequencies, is to use material dispersion. Regards, Steven G. Johnson _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
