Dear Prof. Steven and meep users!
I would like to ask you about the Amplitude in (run-k-points ...) simulation.
What I want to say...
If I do the simulation of light propagation in 2D structure (planar dielectric
waveguide) with the cw source,
I set the amplitude A, for example, and I can obtain the Power (there were a
lot of Prof. Steven's explanation about
how to do this in this mailing list). So, If I do the simulation of gaussian
pulse propagation in such structure,
I also can obtain the something like
(flux-in-box X (volume (center 0 0 0) (size 0 sy 0)))
I have I wave, propagating in positive X direction. So I can obtain some value
of power over again.
If I do the simulation in order to obtain the dispersion characteristic
(omega(k) dependency, omega - frequency, k - longitudal wavenumber, for example
) I use the (run-k-point ...) in meep.
I write smt like
(run-until 500
(at-beginning output-epsilon)
(at-every dt flux-plane)
(at-every dt energy-box)
(to-appended "ez" (at-every 0.5 output-efield-z))
(after-sources (harminv Ez (vector3 0.1234 0) fcen df))
)
where
(define (flux-plane) (print "flux-poynting-plane:, "
(meep-time) ", " (flux-in-box X (volume (center 0 0 0) (size 0 sy 0))) "\n"))
So I obtain the power characteristics as well - and righ away I make a
comparison and see that there is
a differences in power calculation between the gaussian calculation and
(run-k-points ...) calculation.
The difference is big.
What is the reason for... you will ask me)
This is the attempt to obtain a dispersion for nonlinear structure. So I've
obtained the dispersion for nonlinear periodic structure
and now I would like to estimate the specific power for the specific value of
nonlinear frequency shift.
Or if it is possible, how to find the detailed information about how does
(run-k-point ...) work ? f
(maybe only the meep's source code)
Cordially,
Alexandr.
PhD Student, Russia.
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