Quantum dot states and optical excitations of edge-modulated graphene nanoribbons
Quantum dot states and optical excitations of edge-modulated graphene nanoribbons
We investigate from first principles the electronic and optical properties of edge-modulated armchair graphene nanoribbons, including both quasiparticle corrections and excitonic effects. Exploiting the oscillating behavior of the ribbon energy gap, we show that minimal width-modulations are sufficient to obtain confinement of both electrons and holes, thus forming optically active …