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Träfflista för sökning "WFRF:(Olbrich P) srt2:(2011)"

Sökning: WFRF:(Olbrich P) > (2011)

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1.
  • Drexler, C., et al. (författare)
  • Terahertz radiation induced edge currents in graphene
  • 2011
  • Ingår i: RMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves. - 9781457705090
  • Konferensbidrag (refereegranskat)abstract
    • We report on the observation of the terahertz radiation induced edge photogalvanic effect. The directed net electric current is generated in single layer graphene by the irradiation of the samples' edges with linearly or circularly polarized terahertz laser radiation at normal incidence. We show that the directed net electric current stems from the sample edges, which reduce locally the symmetry and result in an asymmetric scattering of carriers driven by the radiation field.
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2.
  • Karch, J., et al. (författare)
  • Terahertz Radiation Driven Chiral Edge Currents in Graphene
  • 2011
  • Ingår i: Physical Review Letters. - : American Physical Society. - 1079-7114 .- 0031-9007. ; 107:27
  • Tidskriftsartikel (refereegranskat)abstract
    • We observe photocurrents induced in single-layer graphene samples by illumination of the graphene edges with circularly polarized terahertz radiation at normal incidence. The photocurrent flows along the sample edges and forms a vortex. Its winding direction reverses by switching the light helicity from left to right handed. We demonstrate that the photocurrent stems from the sample edges, which reduce the spatial symmetry and result in an asymmetric scattering of carriers driven by the radiation electric field. The developed theory based on Boltzmann's kinetic equation is in a good agreement with the experiment. We show that the edge photocurrents can be applied for determination of the conductivity type and the momentum scattering time of the charge carriers in the graphene edge vicinity.
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  • Resultat 1-2 av 2

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