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

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

doi:10.1063/1.4745787

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

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

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 language	English
Article number	073103
Journal	Applied Physics Letters
Volume	101
Issue number	7
DOIs	https://doi.org/10.1063/1.4745787
State	Published - 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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abstract = "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.",

author = "Minjung Kim and Yoon, {Ho Ang} and Seungwoo Woo and Duhee Yoon and Lee, {Sang Wook} and Hyeonsik Cheong",

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AU - Yoon, Duhee

AU - Lee, Sang Wook

AU - Cheong, Hyeonsik

N1 - 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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N2 - 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.

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

Abstract

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