Plasmonic Nanoantenna based Ultrafast and Broadband Graphene Photodetectors

Abstract

We present broadband photodetection from 800 nm to 20 μm with operation speeds exceeding 50 GHz and responsivity levels as high as 0.6 A/W at 0.8 μm and 11.5 A/W at 20 μm by using plasmonic nanoantennas as photodetector contact electrodes on graphene.