Dear MEEP users,
I have modeled a dispersive material and now trying to simulate a
sphere. I am having a problem with the size of sphere. My sphere radius is 0.01
(in meep units), which is equivalent to 10nm. The source size is 0.5 x 0.5 x 0.
See the code given below. The problem is that when i run the simulation, i
obtained a very small sphere, which seems like a point. I don't want to change
the radius of the sphere because i saw on the meep group that the sphere radius
should be much smaller than the size of source and also one big reason is that
when i increased the radius of a sphere then i got higher modes. I am only
interested in lower modes like monopole, diapole and quadrapole etc. I even
increased the resolution up to 150 but still facing the same problem. I am
using "h5topng -S3 -t1:6000 -y15 -Zc dkbluered sphere-y-efield.h5" for output.
Does anybody know where the problem is? or Give me some suggestions to solve
this problem.
(set! geometry-lattice (make lattice (size 0.5 0.5 1)))
(set! geometry
(list
(make sphere (center 0 0 0) (radius 0.01)
(material (make dielectric (epsilon 1)
. . . . .
))
(set! resolution 150)
(set! sources (list
(make source
(src(make gaussian-src (wavelength 0.6) (width 0.6)))
(component Ey)
(center 0 0 -0.3)
(size 0.5 0.5 0)
)
)
) . . . . .
Best Regards,
Hogen
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