Fig. 2
From: Angle-Insensitive Broadband Absorption Enhancement of Graphene Using a Multi-Grooved Metasurface
a Spectra of the multi-grooved metasurface without graphene. b Absorption spectra of the total structure, graphene, and silver for the multi-grooved metasurface with graphene. The parameters are Λ = 300 nm, t = 5 nm, w = 30 nm, D = 100 nm, d1 = 20 nm, d2 = 35 nm, d3 = 50 nm, d4 = 80 nm, d5 = 90 nm, N = 10, and θc = 0°