YANG, Jianji; SAUVAN, Christophe; LIU, Haitao; LALANNE, Philippe

doi:10.1103/PhysRevLett.107.043903

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YANG, Jianji
Laboratoire Charles Fabry de l'Institut d'Optique / Naphel

SAUVAN, Christophe
lp2n-03,lp2n-13
Laboratoire Charles Fabry de l'Institut d'Optique / Naphel

LIU, Haitao
Key Laboratory of Opto-electronic Information Science and Technology

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Physical Review Letters. 2011, vol. 107, p. 043903

American Physical Society

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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.< Leer menos

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Theory of fishnet negative-index optical metamaterials

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