Large slow light capacity in graphene-based grating waveguide

We have systematically investigated the slow light performances based on two-dimensional material graphene, giving the conclusion that graphene exhibits much larger slow light capability than other materials. A large delay-bandwidth product has been obtained in a simple yet functional graphene-based waveguide with slow down factor c / υ_g at 109 and slow light bandwidth Δω at 14.5 nm, which is several orders of magnitude larger than previous results.