Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Figure 50

(a) Schematic picture showing transverse magnetic light impinging on graphene placed on a periodically structured conducting substrate. The light is converted into surface plasmonic waves and subsequently absorbed in graphene. (b) Dependence of the absorption at resonance on the corrugation height (left panel) for different graphene Fermi energies, , and relative absorption for a nonzero metamaterial relaxation’s rate. (c) Optical conductivity of graphene under electric bias. (d) Thermal emission property of the grapheme layer obtained from Kirchhoff’s law. (e) Schematic of the graphene absorber under both electric bias and magnetic bias. (f) Absorption of the dual-biased absorber. Figures are reproduced from [249, 251, 252].

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