Optical properties of graphene antidot lattices

Details Optical properties of graphene antidot lattices Optical properties of graphene antidot lattices

2008-06-02

arxiv.org/abs/0806.0277v1

Phys. Rev. B 77, 245431 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 9 figures, accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.77.245431

Undoped graphene is semi-metallic and thus not suitable for many electronic and optoelectronic applications requiring gapped semiconductor materials. However, a periodic array of holes (antidot lattice) renders graphene semiconducting with a controllable band gap. Using atomistic modelling, we demonstrate that this artificial nanomaterial is a dipole-allowed direct gap semiconductor with a very pronounced optical absorption edge. Hence, optical infrared spectroscopy should be an ideal probe of the electronic structure. To address realistic experimental situations, we include effects due to disorder and the presence of a substrate in the analysis.

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