Re: ERROR: In procedure list

By default MPB considers a square lattice, you actually only need to define the size of the supercell (also, bracket is missing):

(set! geometry-lattice (make lattice (size 1 1 h)))

Regards,

Fred.

On Jun 21 2006, Kai Lin Woon wrote:

>I am still new in using the software. I am trying to simulate photoniccrystal slab with air-hole square lattice. When I try to run the programme, it returns with an error. I wonder anyone has an idea what is wrong with the programme below.
>(define-param h 3) ; the thickness of the slab(define-param eps 2.05); the dielectric constant of the slab(define-param loweps 1.0) ; the dielectric constant of the substrate(define-param r 0.33) ; the radius of the holes; square lattice:(set! geometry-lattice (make lattice (size 1 1 h)                   (basis1 0 1)                   (basis2 1 0))                         (set! geometry      (list (make block (material (make dielectric (epsilon eps)))              (center 0 0 0) (size infinity infinity h))          (make cylinder (material air)              (center 0 0 0) (radius r) (height h)))); 1st Brillouin zone of a square 
>lattice:(define Gamma (vector3 0 0 0))(define M (vector3 0 0.5 0))(define K (vector3 0.5 0.5 0))(define-param only-K false) ; run with only-K=true to only do this k-point(define-param k-interp 4)   ; the number of k points to interpolate(if only-K    (set! k-points (list K))    (set! k-points (interpolate k-interp (list Gamma M K Gamma))))(set-param! resolution (vector3 32 32 16))(set-param! num-bands 8)(run-te)(run-tm)  Thanks
>KL Woon
>
>

-- 
Frederic Brossard
Cavendish Laboratory
J J Thomson Avenue
Cambridge CB3 0HE