17 May 2011 Bloch modes of optical fishnets
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Abstract
From a microscopic point of view, we theoretically investigate fishnet metamaterials. We formulate the construction of the fundamental Bloch mode by tracking the flows of energy through the fishnet structure. The analysis is supported by a closed-form semi-analytical model based on surface-plasmon coupled-mode equations. The model provides an accurate formula for the fishnet refractive index, including the real (negative-valued) and imaginary parts. The model simply explains how the surface plasmon modes couple in the structure and it shines new light on the fishnet negative-index paradigm at optical frequencies. It possesses broad flexibility in geometrical and material parameter tailoring of fishnet properties, even including the gain-assisted case.
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J. Yang, J. Yang, C. Sauvan, C. Sauvan, P. Lalanne, P. Lalanne, H. T. Liu, H. T. Liu, } "Bloch modes of optical fishnets", Proc. SPIE 8070, Metamaterials VI, 807006 (17 May 2011); doi: 10.1117/12.888990; https://doi.org/10.1117/12.888990
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