Hello Meep Users,
I’d like to run a pulse through a 1D slab then measure the exit-plane e-field
as a function of time. I do not want to measure the field within the entire
slab.
I set the geometry as:
(set! geometry-lattice (make lattice (size no-size no-size sz))) ; create 1D
system
and placed the source:
(set! sources (list
(make source
(src (make gaussian-src (frequency fcen) (fwidth df)))
(component Hy)
(center 0 0 (+ (* -0.5 sz) dpml)) ; located at - end of
waveguide
(amplitude amp))))
Here I run the simulation, which I originally got from a 2D waveguide tutorial:
; run the simulations
(run-sources+ 1600
(in-volume (volume (center 0 0 (+ (* 0.5 sz) dpml)) (size 0 0 sz))
(after-time 300
(to-appended "ex-slice" (at-every .3 output-efield-x))))))
I believe it is not giving me what I should expect when I plot it. From the
tutorial, I saw it gives an space by time data set. I get the pulse center
propagating down the time axis. I would expect it to go down the space axis and
the time axis should show me an changing envelope as it pass through space
(since I am running this through an epsilon=1 material). This leads me to think
I am not asking meep for the right thing.
How can I just measure the field as it comes through the end of the 1D slab?
Thanks!
Priscilla
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