Abstract
We measured the polarization dependence of the photocurrent in symmetric Pd-graphene-Pd photodevices. The photocurrent is maximum when the polarization angle of the incident light is parallel to the edge of an electrode. On the other hand, when the polarization direction is parallel to the graphene channel, the photocurrent is minimum. This polarization dependence of the photocurrent is similar to what has been observed in an asymmetric Pd-graphene-Ti device and results from an anisotropic electron-photon interaction in graphene, which generates photocarriers with momenta predominantly in the direction perpendicular to the polarization direction.
| Original language | English |
|---|---|
| Pages (from-to) | 1019-1022 |
| Number of pages | 4 |
| Journal | Journal of the Korean Physical Society |
| Volume | 63 |
| Issue number | 5 |
| DOIs | |
| State | Published - 2013 |
Bibliographical note
Funding Information:We thank Prof. W. Y. Lee of Yonsei University for making a wire bonder available for sample preparation. This work was supported by a National Research Foundation of Korea grant funded by the Ministry of Education, Science and Technology of Korea (MEST, No. 2011-0017605, 2008-2004744 and No. 2011-0021207), by the World-Class University program (R31-2008-000-10057-0), by the TJ Park Science Fellowship of POSCO TJ Park Foundation, and by a grant (No. 2011-0031630) from the Center for Advanced Soft Electronics under the Global Frontier Research Program of the MEST.
Keywords
- Graphene
- Graphene photodevice
- Photocurrent
- Raman mapping