Clarify that the radiation pattern of a nonaxisymmetric dipole integrated in the azimuthal direction is rotationally invariant

[oskooi]

Adds a note to Tutorial/Cylindrical Coordinates/Nonaxisymmetric Dipole Sources to menion that integrating $\phi$ over the range [0, 2π] for a nonaxisymmetric dipole is essentially equivalent to placing a series of linearly polarized dipoles along the circumference of a circle with fixed radius.

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[villadsegede]

Just out of curiosity: What is your experience with solver efficiency when you introduce complex light sources? In the use cases I've tested, the advantage of rotational design symmetry was lost in practice, and I could imagine it is the same here? (i.e. one might as well have run embarassingly parallel 3D simulations using ODA, for example)

... And then there can still be other reasons for or against (i.e. once you have the radial basis solutions, you might as well recombine them to represent several sources if so desired)

[stevengj]

I'm not sure what you mean by "complex light sources". Certainly for off-axis planewaves we find it's still more efficient to use cylindrical coordinates, unless the angle is close to 90°. 3d simulations are expensive, and the cylindrical simulations at different m's are embarassingly parallel.