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Polarization dependence of photocurrent in a metal-graphene-metal device

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arxiv 1207.7223 v1 pith:I2VA37DP submitted 2012-07-31 cond-mat.mes-hall

Polarization dependence of photocurrent in a metal-graphene-metal device

Minjung Kim , Ho Ang Yoon , Seungwoo Woo , Duhee Yoon , Sang Wook Lee , Hyeonsik Cheong This is my paper
classification cond-mat.mes-hall
keywords polarizationphotocurrentdependencegraphenedevicedirectionincidentphoton
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The dependence of the photocurrent generated in a Pd/graphene/Ti junction device on the incident photon polarization is studied. Spatially resolved photocurrent images were obtained as the incident photon polarization is varied. The photocurrent is maximum when the polarization direction is perpendicular to the graphene channel direction and minimum when the two directions are parallel. This polarization dependence can be explained as being due to the anisotropic electron-photon interaction of Dirac electrons in graphene.

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