  Polarizability theory and discrete dipole approximation in a rotating medium
rest-frame is developed and discussed. The analysis is based on a rigorous
rotating medium Green's function, and is used to study the effect of rotation
on various arrays and metamaterials. The non-reciprocal electrodynamics induced
by the rotation is exposed and studied. Although it can be interpreted in terms
of the multiplicity of Sagnac interference loops inside the structure, the
associated rotation footprint exhibits new effects of the structure parameters
not previously reported in conventional Sagnac effect. The resulting
non-reciprocity will also be demonstrated and discussed.
