Landau levels for electromagnetic wave
  In this paper we show that the frequencies of propagating electromagnetic wave (photon) in rotating dielectric medium obey Landau quantization. We show that the degeneracy of right and left helicities of photons is broken on the lowest Landau level. In homogeneous space this level is shown to be helical, i.e. left and right helical photons counter-propagate. This leads to helical vortical effect for photons. 
Vladimir A. Zyuzin
physics.optics cond-mat.mes-hall