Output in-plane fields when using non-cartesian basis vectors

Dear MPB users

I am trying to obtain an E-field profile for the first y-odd gap band in a
W1 waveguide in a triangular lattice hole slab structure. As you know, this
mode has non-zero Ex,Ey and Hz.

I am using a modified version of the tri-holes.ctl file, which uses the
basis vectors (basis1 (/ (sqrt 3) 2) 0.5) and (basis2 (/ (sqrt 3) 2)
-0.5))). When I output the Hz field and run mpb-data to restore a
rectangular cell, everything is OK. However, the fields appear skewed when
I do the same for the E-fields and I'm not sure why this is the case.

Can anyone shed some light on this issue please?

Thanks

Rikki Coles

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