Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-02-04
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
13 pages, 7 figures
Scientific paper
We report on the observation of photon helicity driven currents in graphene. The directed net electric current is generated in single layer graphene by circularly polarized terahertz laser radiation at normal as well as at oblique incidence and changes its sign upon reversing the radiation helicity. The phenomenological and microscopic theories of the observed photocurrents are developed. We demonstrate that under oblique incidence the current is caused by the circular photon drag effect in the interior of graphene sheet. By contrast, the effect at normal incidence stems from the sample edges, which reduce the symmetry and result in an asymmetric scattering of carriers driven by the radiation field. Besides a photon helicity dependent current we also observe photocurrents in response to linearly polarized radiation. The microscopic mechanisms governing this effect are discussed.
Brinsteiner C.
Eroms J.
Ganichev Sergey D.
Glazov M. M.
Ivchenko Eougenious L.
No associations
LandOfFree
Photon helicity driven electric currents in graphene 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 Photon helicity driven electric currents in graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photon helicity driven electric currents in graphene will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-155480