Dear Steven and other meep users,
I have a slab structure which is air, silion and silicon dioxide from top to
bottom. The structure has period on x direction, so I use PML boundary
condition on y and z direction and periodic boundary condtion on x side.
However, I found the magnitude of field is large inside PML. When the structure
is 2D, i.e., the structure is homogenous along z direction, PML boundary
condition on y and periodic boundary condtion on x side is used, the result is
good and is consistent with the result given by MPB. I think there is something
wrong with cooperation with PML boundary condition and periodic boundary
condtion in 3D, whereas this problem doesn't exist in 2D. I simulated a very
simple structure, a block, to verify my expectation. When I use PML on every
side, magnitude of field is very low inside PML. Magnitude is very larger
inside PML when I use PML boundary condition on y and z direction and periodic
boundary condtion on x side. How to deal with it?
Thank you in advance!
Young-Soo Lee
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