Dear Meep-users,
I hope you can help me with two questions:
1) When I fit experimental data of the dielectric function with the
formula given in Materials in Meep, so find the polarizabilities, it
seems to me that the solution is not really unique. I guess there are
also unphysical sets of parameters which model the dielectric function
correctly. Will the results I get from my simulations in Meep be the
same and correct for all of these sets of polarizability parameters or
do I have to find a certain physically correct one? If yes, how do I
find this specific set?
2) I can't manage to make a Ex source work in a 2D simulation. When I
run the simulation with my source code for Ez everything works fine, if
I replace the field by Ex, it doesn't work. Same with Ey. I am making
the fields visible using h5topng. What is my error? The source code is:
(set! sources (list (make source (src (make gaussian-src (frequency
1.33333333) (width 1.06060606))) (component Ex) (center 0 0.2) (size 0 0))))
;define the calculation space
(set! geometry-lattice
(make lattice
(size 0.5 0.5 no-size)
)
)
;define materials
(define Al2O3
(make dielectric
(epsilon 8.5)
)
)
(set! geometry
(list
(make block (center 0 -0.2) (size 0.1 0.1 infinity) (material
Al2O3)) ; Al2O3 substrate
)
)
(set! pml-layers (list (make pml (thickness 0.01))))
(set! resolution 1000)
;(set! Courant 0.5)
(use-output-directory "/scratch/skapser/polarisations/")
;(use-output-directory
"/home/stud/skapser/Desktop/meep/a1um/custom-src-laser-and-structure-polarisation/")
(run-until 5
(at-beginning output-epsilon)
(to-appended "ex" (at-every 0.5 output-efield-x))
)
Thanks a lot!
Stefan
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