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

Optical properties of graphene antidot lattices