hello meep user
I need some help with h5topng
I do FDTD simulation by Meep with photonic crystal structure structure. This is
my ctl file
; some parameters for geometry
(define notomi (make dielectric (index 12.96)))
(define-param Nx 30) ; separuh nilai genap dari kolom silinder
(define-param Ny 50) ; separuh nilai genap dari baris silinder
(define-param r 0.35) ; jari-jari silinder
; some parameters for computational cell
(define-param tepiy 10); y-length between PML and slab
(define-param tepix 5); x-length between PML and slab
(define-param dpml 1); PML thickness
(define-param sy (+ (* 2 tepiy) (* 2 Ny (/ (sqrt 3) 2)) dpml)) ; cell size in y
direction
(define-param sx (+ (* 2 tepix) Nx dpml dpml)) ; cell size in x direction
(set! geometry-lattice (make lattice (size sx sy no-size)))
;struktur definition
(set! default-material air) ; everything is air
(set! geometry
(append
(geometric-objects-duplicates (vector3 0 (sqrt 3) 0) 0 Ny
(geometric-objects-duplicates (vector3 1 0 0) 0 Nx
(list
(make cylinder (center (+ (+ (* (/ sx 2) -1)
dpml) tepix) (+ (+ (* (/ sy 2) -1) dpml) tepiy) 0) (radius r) (height infinity)
(material notomi)))))
(geometric-objects-duplicates (vector3 0 (sqrt 3) 0) 0 (- Ny 1)
(geometric-objects-duplicates (vector3 1 0 0) 0 (- Nx
1)
(list
(make cylinder (center (+ (+ (+ (* (/ sx
2) -1) dpml) 0.5) tepix) (+ (+ (+ (* (/ sy 2) -1) dpml) tepiy) (/ (sqrt 3) 2))
0) (radius r) (height infinity)
(material notomi)))))))
;PML and resolution
(set! pml-layers (list (make pml (thickness dpml))))
(set! resolution 20)
;source
(define-param fcen 0.50)
(define-param df 0.2)
(define-param w 4)
(set! sources (list
(make source
(src (make gaussian-src (frequency fcen) (fwidth df)))
(component Ey)
(center 0 0)
(size 0 w))))
(run-until 200
(at-beginning output-epsilon)
(at-end output-efield-z)))
Then I try to see the picture by command " h5topng -t 0:30 -R -Zc dkbluered -a
yarg -A cobamodif1-eps-000000.00.h5 cobamodif1-ez.h5"
and I only got pictures of totally black rectangular. Is there something wrong
with my ctl file or my command. I urgently need your suggestion. Thank you for
the help
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