Anisotropic photoconductivity in graphene
  We investigate the photoconductivity of graphene within the relaxation time approximation. In presence of the inter-band transitions induced by the linearly polarized light the photoconductivity turns out to be highly anisotropic due to the pseudospin selection rule for Dirac-like carriers. The effect can be observed in clean undoped graphene samples and be utilized for light polarization detection. 
Maxim Trushin and John Schliemann
cond-mat.mtrl-sci cond-mat.mes-hall