Figure 1 | Scientific Reports

Figure 1

From: Graphene perfect absorber of ultra-wide bandwidth based on wavelength-insensitive phase matching in prism coupling

Figure 1

(a) Schematic of the proposed graphene perfect absorber composed of Prism(n1)-Cavity(n2)-Air(n3), where monolayer graphene is embedded in the cavity and n1 > n2 > n3 = 1. The red thin layer represents the monolayer graphene of 0.34 nm thickness as an absorbing medium. (b) The material dispersions of BK7 glass (n1) and PDMS (n2), and the ratio (n2/n1) between them over the wavelength range of λ = 0.82~2.50 μm. The blue, red, and green curves represent the cases of non-dispersion, real dispersion, and ideal dispersion, respectively.

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