On Apr 30, 2008, at 3:53 PM, avner yanai wrote: > Generally, in order to excite SPP's you will need a k vector > parallel to the > metal\dielectric interface that has an absolute value larger than > the k vector > in the propagating (dielectric) area. > > I think the easiest way to achieve this is by using a grating or by > letting the > light diffract threw a subwavelength but propagating slit
If you just want to look at the SPP mode, it's probably a cleaner simulation to excite it by modifying the source rather than by modifying the geometry (unless you want to match how you excite it in a physical experiment). It's certainly possible to specify a source with any wavevector you want, including a wavevector underneath the light cone, since you can give the current source an arbitrary spatial pattern. Or just use a point source, which is the analogue of a subwavelength slit. Steven _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
