Enhanced Optical Dichroism of Graphene Nanoribbons

Details Enhanced Optical Dichroism of Graphene Nanoribbons Enhanced Optical Dichroism of Graphene Nanoribbons

2011-07-07

arxiv.org/abs/1107.1509v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 5 figures

Scientific paper

The optical conductivity of graphene nanoribbons is analytical and exactly derived. It is shown that the absence of translational invariance along the transverse direction allows considerable intra-band absorption in a narrow frequency window that varies with the ribbon width, and lies in the THz band for ribbons 10-100nm wide. In this region the anisotropy in the optical conductivity can be as high as two orders of magnitude, which renders the medium dichroic, and allows near 100% polarizability with just a single layer of graphene.

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