Gold-patched graphene nano-stripes for high-responsivity and ultrafast photodetection from the visible to infrared regime.

ABSTRACT: Graphene is a very attractive material for broadband photodetection in hyperspectral imaging and sensing systems. However, its potential use has been hindered by tradeoffs between the responsivity, bandwidth, and operation speed of existing graphene photodetectors. Here, we present engineered photoconductive nanostructures based on gold-patched graphene nano-stripes, which enable simultaneous broadband and ultrafast photodetection with high responsivity. These nanostructures merge the advantages of broadband optical absorption, ultrafast photocarrier transport, and carrier multiplication within graphene nano-stripes with the ultrafast transport of photocarriers to gold patches before recombination. Through this approach, high-responsivity operation is realized without the use of bandwidth-

SUBMITTER: Cakmakyapan S 

PROVIDER: S-EPMC6107021 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature