See https://github.com/NanoComp/meep/issues/1319 
<https://github.com/NanoComp/meep/issues/1319>

Note you can also implement any source you want on your own by adding a volume 
source with an amplitude function (e.g. interpolated from a file, or your own 
mode solver).

> On Aug 14, 2020, at 12:19 PM, Kramnik Daniel <daniel.kram...@gmail.com> wrote:
> 
> Thanks, is there any plan to implement cylindrical coordinates?
> 
> On Fri, Aug 14, 2020 at 9:14 AM Ardavan Oskooi <ardavan.osk...@gmail.com 
> <mailto:ardavan.osk...@gmail.com>> wrote:
> Meep's eigenmode decomposition (and eigenmode source) feature only 
> supports Cartesian coordinates.
> 
> On 8/13/20 01:23, Kramnik Daniel wrote:
> > I'm trying to design some silicon photonic ring resonator structures 
> > using MEEP/MPB and was wondering if the modesolver can work in 
> > cylindrical coordinates. It looks like the FDTD solver supports 
> > cylindrical coordinates, based on the "ring resonator" examples.
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