Re: 1d periodic structure.

hi,

i think you need (set! default-material ...) not (set! default material ...).

cheers
nate

fred <[email protected]> wrote:

>    Hi all,
>            My question might be easy but I am new to photonic   
> crystal and mpb.
>   I have written a simple (I hope) ctl file and it does not seem to   
> run. I would
> be grateful is you can spot something wrong with the ctl file below
>
> (set! resolution 1024)
> (define-param eps1 12)
> (define-param eps2 5.45)
> (set! geometry-lattice (make lattice (size 1 no-size no-size)))
>
> (define-param d1 0.3)
> (define-param d2 0.3)
>
> (set! default material (make dielectric (epsilon eps2)))
>
> (set! geometry (list (make block (center 0)
> (size d1 infinity infinity) (material (make dielectric (epsilon eps1))))))
>
> (set! k-points (list (vector3 0) (vector3 0.5)
> (set! k-points (interpolate k-points 9))
>  (set-param! num-bands 5)
>  (run-tm)
>
>
>  I get an error that says
>
> ERROR: In procedure set!:
> ERROR: missing or extra expression
>
>  in my output file.
>
>   One more thing , what is meant by " quarter-wave thickness or
> half-wave-thickness) I have seen Steven use it in example ctl but I dont
> understand what it really  means. Help is greatly appreciated.
> Cheers.
>
>
>
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nate lipkowitz
416 823 8057
[email protected]