On Jan 28, 2008, at 1:54 PM, Goldwin, Jonathan M wrote:
>    I would like to speed up a 3D simulation by exploiting the  
> cylindrical symmetry of my structure (essentially an on-axis lens,  
> with m=0), but I need a plane-wave source.  A linearly polarized  
> source lacks cylindrical symmetry, so I need to generate circularly  
> polarized light.  How can I create a circularly polarized plane-wave  
> source in cylindrical coordinates?
>

A circularly polarized planewave in cylindrical coordinates is E =  
(rhat + i phihat) exp(i phi).  So, just create a constant Er (radial)  
current source and a constant Ep (phi) current source with amplitude  
0+1i, and use m=1.

Steven

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