My bad. I found Steven already gave the example for this. e.g., copied from
http://www.mail-archive.com/[email protected]/msg00074.html " Just provide an amplitude function (amp-func property) that gives the field amplitude as a function of space to make a Gaussian envelope. To tilt the beam, add an exp(ikx) phase. e.g. do: (define ((my-amp sigma k) x) (exp (- (* 0+2i pi (vector3-dot k x)) (/ (vector3-dot x x) (* 2 sigma sigma))))) and then create a source with (amp-func (my-amp s k)) where you pass it the desired width s and k-vector k. (Note that the syntax (define ((foo x) y) ...) defines a function (foo x) that returns a function of y.)" _______________________________________________ meep-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
