Quoting "Steven G. Johnson" <[EMAIL PROTECTED]>:
On Fri, 3 Nov 2006, Zhichao Ruan wrote:
[...]
You have an Hx source at z=0. It may seem like this is even with
respect to z=0, but it is in fact odd.
[...]
So, what you want is something like:
(set! symmetries (list (make mirror-sym (direction Z) (phase -1))))
where the (phase -1) means that the mirror plane is odd.
Well, I don't like the way symmetries are handled right now. But maybe
I missunderstand something.
So let's consider a structure with a plane symmetry in the Y direction.
Let's send a pulse in the X direction.
If the electric field is Ey, I need a phase of -1.
If the electric field is Ez, I need a phase of 1.
If this is correct, then this is bad. How do I define the phase for a
field (Ey+Ez), which is a linearly polarized wave at 45 degrees ? I
still have symmetry, but with different "phase" for the X and Y
component separately. And what about a circulary polarized wave, with
(Ey + iEz) ?
I believe that the more "correct" way would be to deduce the phase,
making the assumption that if we give a symmetry, this means that our
structure have this symmetry and that we want our source to have it too.
What do you think ?
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