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

Minjung Kim, Ho Ang Yoon, Seungwoo Woo, Duhee Yoon, Sang Wook Lee, Hyeonsik Cheong

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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.

Original languageEnglish
Article number073103
JournalApplied Physics Letters
Issue number7
StatePublished - 13 Aug 2012

Bibliographical note

Funding Information:
We thank Professor W. Y. Lee of Yonsei University for making a wire bonder available for sample preparation. This work was supported by the National Research Foundation of Korea grant funded by the Ministry of Education, Science and Technology of Korea (Grant Nos. 2011-0017605 and 2011-0021207), WCU (R31-2008-000-10057-0), and a grant (Grant No. 2011-0031630) from the Center for Advanced Soft Electronics under the Global Frontier Research Program of the MEST.


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