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26 April 2024

» arxiv » 1107.1509

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Enhanced Optical Dichroism of Graphene Nanoribbons
F. Hipolito ; A. J. Chaves ; R. M. Ribeiro ; M. I. Vasilevskiy ; Vitor M. Pereira ; N. M. R. Peres ;
Date:	7 Jul 2011
Abstract:	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.
Source:	arXiv, 1107.1509
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