Helicity-dependent photocurrents in graphene layers excited by mid-infrared radiation of a CO${}_2$-laser

Chongyun Jiang, V. A. Shalygin, V. Yu. Panevin +6

We report the study of the helicity driven photocurrents in graphene excited by mid-infrared light of a CO${}_2$-laser. Illuminating an unbiased monolayer sheet of graphene with circ…