Hi Samyo, In this <https://github.com/NanoComp/meep/issues/971> github issue, I define a spatial gaussian amp_func for an eigenmode source to simulate the beamwaist of a laser. It's not a *waveguide* mode, but it's the same concept.
You can also try posting an issue on github with your script and the corresponding error message. If it is a bug that you've found, it's nice to have a MWE that can be used to resolve the issue. Thanks, Alec On Mon, Dec 9, 2019 at 9:24 AM Samyobrata Mukherjee <samyobr...@gmail.com> wrote: > Hi, > > I am currently using Meep to simulate modes in 1D planar uniaxial > waveguides. The MPB eigensolver does not meet my needs since I often work > with improper modes and that is why I want to use amp_func to define my > source. > > I have used a function that gives a gaussian beam source in amp_func in > order to test the feature and it works as expected. However, when I try to > insert the currents calculated from the waveguide eigenmode following the > process in Chapter 4 of Taflove's 2013 book, the pymeep kernel simply > crashes even when I run sim.plot2D() even before sim.run(). > > I import the calculated eigenmode current and save it in a file in Matlab. > I read that file in python and then define a function using that data which > meets the requirements of amp_func as given in the documentation, i.e., *a > Python function of a single argument, that takes a Vector3 giving a > position and returns a complex current amplitude for that point.* > > So I don't quite understand why the kernel crashes. I was wondering if > anyone has experience with using amp_func to insert eigenmodes into > waveguides in meep and could give me a few pointers, or could point me > towards code that achieves it. > > *Tl;dr* - I would be grateful if you could point me to any > discussion/code on using amp_func to define sources to input waveguide > eigenmodes in meep. > > Regards, > Samyo > > _______________________________________________ > meep-discuss mailing list > meep-discuss@ab-initio.mit.edu > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
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