On Mon, 9 Jul 2007, Aaron Webster wrote: > I'm studying optical resonators, and am trying to understand how you > would define a mirror in meep. I've searched all around, and can't seem > to figure out how you would define such a surface (say, a 99% reflective > mirror.) I thought I could work it out by using a complex permittivity, > but it seems meep doesn't appreciate complex values for this. > Furthermore, a perfect conductor appears not to give the required phase > shift I need.
You can just give a slab of negative permittivity to make a mirror. A perfect metal is just a permittivity that goes to negative infinity. (Be sure to turn off epsilon averaging, since that doesn't currently work with negative permittivities.) Of course, there are lots of other ways to make mirrors, too, e.g. you could make a photonic crystal. This has nothing to do with Meep per se, and is just a question of electromagnetism. As for complex permittivities, you can specify these in Meep using a dispersive material. This is useful if you want a mirror with absorption loss, but not if you want a lossless mirror. Steven _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
