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

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

2011-05-31

arxiv.org/abs/1105.6262v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

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 circularly polarized radiation generates -- under oblique incidence -- an electric current perpendicular to the plane of incidence, whose sign is reversed by switching the radiation helicity. We show that the current is caused by the interplay of the circular $ac$ Hall effect and the circular photogalvanic effect. Studying the frequency dependence of the current in graphene layers grown on the SiC substrate we observe that the current exhibits a resonance at frequencies matching the longitudinal optical phonon in SiC.

Affiliated with

Also associated with

No associations

Rating

Helicity-dependent photocurrents in graphene layers excited by mid-infrared radiation of a CO$_2$-laser does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Helicity-dependent photocurrents in graphene layers excited by mid-infrared radiation of a CO$_2$-laser, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Helicity-dependent photocurrents in graphene layers excited by mid-infrared radiation of a CO$_2$-laser will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-338111