Dear Steven,
I have studied MPB for several days. I repeated Fig.3 (a) of Fan's
article (PRB 65, 235112). The following is my result and Fan's figure. I
don't understand there are some lines above the light line in the figure.
There are no these lines in Fan's figure. Can you help me about this? Thank
you very much! I can't paste the figures because the mail can't be larger
than 40k.
This is the control file:
(define-param h 0.5) ; the thickness of the slab
(define-param eps 12.0) ; the dielectric constant of the slab
(define-param loweps 1.0) ; the dielectric constant of the substrate
(define-param r 0.2) ; the radius of the holes
(define-param supercell-h 4) ; height of the supercell
; square lattice with vertical supercell:
(set! geometry-lattice (make lattice (size 1 1 supercell-h)))
(set! geometry
(list (make block (material (make dielectric (epsilon loweps)))
(center 0 0 (* 0.25 supercell-h))
(size infinity infinity (* 0.5 supercell-h)))
(make block (material (make dielectric (epsilon eps)))
(center 0) (size infinity infinity h))
(make cylinder (material air)
(center 0) (radius r) (height supercell-h))))
; 1st Brillouin zone of a square lattice:
(define Gamma (vector3 0 0 0))
(define X (vector3 0.5 0 0))
(define M (vector3 0.5 0.5 0))
(define-param only-M false) ; run with only-K=true to only do this k-point
(define-param k-interp 12) ; the number of k points to interpolate
;(set! k-points (interpolate k-interp (list Gamma X M Gamma)))
(if only-M
(set! k-points (list M))
(set! k-points (interpolate k-interp (list Gamma X M Gamma))))
(set-param! resolution (vector3 32 32 16))
(set-param! num-bands 9)
; Run even and odd bands, outputting fields only at the M point:
(run-zeven (output-at-kpoint M output-hfield-z))
(run-zodd (output-at-kpoint M output-dfield-z))
(display-eigensolver-stats)
Yours Sincerely,
Lina
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