Effective epsilon used for each polarization

Dear Steve,

I want to know what exactly is the effective epsilon used internally by MPB
for field along different polarizations (e.g. epsilon for Ex and Ey for a 2D
hole lattice).  In other words, how can I obtain such information from the
output epsilon.h5. I once tried to assign epsilon.XX for Ex and epsilon.YY
for Ey, but that does not lead to the orthonormality of the Bloch modes.

Many thanks in advance.

Regards,
Minghui Han