Helicity-dependent photocurrents in graphene layers excited by midinfrared radiation of a CO2 laser

|DAAD||IB of BMBF at DLR||Applications Center "Miniaturised Sensorics"||Swedish Research Council||SSF||RFBR||Russian Ministry of Education and Sciences||"Dynasty" Foundation ICFPM||
We report the study of the helicity-driven photocurrents in graphene excited by midinfrared 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. By 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.

Shalygin, V. A.St Petersburg State Polytech University (författare)
Panevin, V. Y.St Petersburg State Polytech University (författare)
Danilov, S. N.University of Regensburg (författare)
Glazov, M. M.Russian Academy of Science (författare)
Yakimova, RositsaLinköpings universitet,Halvledarmaterial,Tekniska högskolan(Swepub:liu)rosia15 (författare)
Lara Avila, Samuel,1983Chalmers tekniska högskola,Chalmers University of Technology,Chalmers(Swepub:cth)larsavil (författare)
Kubatkin, Sergey,1959Chalmers tekniska högskola,Chalmers University of Technology,Chalmers(Swepub:cth)kubatkin (författare)
Ganichev, S. D.University of Regensburg (författare)
University of RegensburgSt Petersburg State Polytech University (creator_code:org_t)

Ingår i:Physical Review B - Condensed Matter and Materials Physics: American Physical Society84:122469-99502469-99691098-01211550-235X

Av författaren/redakt...: Jiang, C. Y.; Shalygin, V. A.; Panevin, V. Y.; Danilov, S. N.; Glazov, M. M.; Yakimova, Rosits ...; visa fler...; Lara Avila, Samu ...; Kubatkin, Sergey ...; Ganichev, S. D.; visa färre...

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