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 _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
