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Journal Articles Physical Review Letters Year : 2011

Theory of fishnet negative-index optical metamaterials

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Abstract

We theoretically study fishnet metamaterials at optical frequencies. In contrast with earlier works, we provide a microscopic description by tracking the transversal and longitudinal flows of energy through the fishnet mesh composed of intersecting subwavelength plasmonic waveguides. The analysis is supported by a semianalytical model based on surface-plasmon coupled-mode equations, which provides accurate formulas for the fishnet refractive index, including the real-negative and imaginary parts. The model simply explains how the surface plasmons couple at the waveguide intersections, and it shines new light on the fishnet negative-index paradigm at optical frequencies. Extension of the theory for losscompensated metamaterials with gain media is also presented.
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hal-00681497 , version 1 (01-12-2015)

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Jianji Yang, Christophe Sauvan, Haitao Liu, Philippe Lalanne. Theory of fishnet negative-index optical metamaterials. Physical Review Letters, 2011, 107, pp.043903. ⟨10.1103/PhysRevLett.107.043903⟩. ⟨hal-00681497⟩
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