  We report unambiguous experimental evidence of broken time reversal symmetry
for the interaction of light with an artificial non-magnetic material.
Polarized colour images of planar chiral gold-on-silicon nanostructures
consisting of arrays of gammadions show intriguing and unusual symmetry:
structures, which are geometrically mirror images, loose their mirror symmetry
in polarized light. The symmetry of images can only be described in terms of
anti-symmetry (black-and-white symmetry) appropriate to a time-odd process. The
effect results from a transverse chiral non-local electromagnetic response of
the structure and has some striking resemblance with the expected features of
light scattering on anyon matter.
