Time-reversal-violating birefringence of photon in a medium exposed to   electric and magnetic field
  The T-reversal-violating optical gyrotropy is discussed. An expression for dielectric permittivity describing T-reversal-violating phenomena in a medium exposed to external electric and magnetic fields is presented. Optical phenomena of birefringence and polarization plane rotation of photon in a medium exposed to external electric and magnetic fields are considered. 
Vladimir G. Baryshevsky