On Apr 21, 2008, at 12:03 AM, Rakesh Mote wrote: > > gratings are handled with periodic BCs. How we can get same results > with periodic BCs. Actually I want to compare with annular gratings > where periodic BCs would be impossible to use. Your say?
An annular grating is not a periodic structure, so your computational cell can't use periodic boundaries as you say---you must just make your computational cell big enough to include enough annular layers. If the are circular layers AND your sources have cylindrical symmetry (not point sources, unless they are at the origin), you can speed things up by using cylindrical coordinates. Steven _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
