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Photon helicity driven electric currents in graphene

Karch, J. ; Olbrich, P. ; Schmalzbauer, M. ; Brinsteiner, C. ; Wurstbauer, U. ; Glazov, M. M. ; Tarasenko, S. A. ; Ivchenko, E. L. ; Weiss, Dieter ; Eroms, J. ; Ganichev, Sergey


Abstract

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 ...

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