Abstract
Abstract
We theoretically demonstrate an ultranarrow perfect light absorption (PIA) of a 3D metamaterial due to the strong coupling between the magnetic plasmon of the Au vertical split-ring resonator (VSRR) and the surface plasmon polariton propagating above the Au film. Through lifting the VSRRs above the metallic film to decrease the dielectric substrate effect, the linewidth of 1.9 nm of the PIA is obtained. Our proposed 3D metamaterial shows the high sensitivity (S = 711 nm RIU, S* = 13/RIU) and figure of merit (FoM = 374, FoM* = 1.3 × 105), which could be used for optical gas sensing in the visible frequency range.
Funder
National Natural Science Foundation of China
Subject
General Physics and Astronomy,General Engineering
Cited by
2 articles.
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