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Fig. 3 | Nanoscale Research Letters

Fig. 3

From: Double Narrowband Induced Perfect Absorption Photonic Sensor Based on Graphene–Dielectric–Gold Hybrid Metamaterial

Fig. 3

a The periodic structure of four graphene blocks. b Three-dimensional diagram of the maximum absorption with incident light Φ and refractive index nd of the dielectric. c The absorption spectrum at positions @(2.3, 10), @(4.3, 10) and @(7.3, 10) of (b), respectively. d The FDTD numerical absorption spectrum with the Fermi level of graphene changing from 0.5 to 1.1 eV (n = 2)

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