Figure 6
From: Ultrabroadband, More than One Order Absorption Enhancement in Graphene with Plasmonic Light Trapping
Broadband absorption enhancement in a graphene double layer by plasmonic light trapping.
The two graphene monolayers are separated by a thin tunnel barrier with a thickness of 5 nm. The top layer of graphene is in contact with the metallic crosses. For simplicity, the separation layer is assumed to be lossless with a refractive index of 1.5.
