The waveguide enables absorption of evanescent light that propagates parallel to the graphene sheet which results in a responsivity as high as 013 A W21 at a 15 V bias for 275 mm light at room tempera

The utilization of waveguides facilitates the absorption of evanescent light that propagates in parallel to the graphene sheet. This leads to a remarkably high responsivity of 0.13 A W21 at a bias of 1.5 V, when subjected to 2.75 mm light at room temperature.