▎ 摘　　要

Transmission and reflection measurements performed on single- and few-layer graphene indicate the presence of circular dichroism (CD). Surface roughness appears to moderate the effect with ultraflat graphene on mica not showing CD. Application of an external magnetic field had no effect, ruling out any contribution from spin polarization. Symmetry breaking of the graphene lattice due to a soft shear mode in the graphene sheet is believed to be the origin of the requisite asymmetry for this effect to occur.