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Hyperbolic metamaterials for dispersion-assisted directional light emission

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Abstract

A novel method is presented to outcouple high spatial frequency (large-k) waves from hyperbolic metamaterials (HMMs) without the use of a grating. This approach relies exclusively on dispersion engineering, and enables preferential power extraction from the top or from the side of a HMM. Multilayer (ML) HMMs are shown to be better suited for lateral outcoupling, while nanowire HMMs are the most convenient choice for top outcoupling. A 6-fold increase in laterally extracted power is predicted for a dipole–HMM system with a Ag/Si ML operating at λ = 530 nm, when metallic filling ratio is changed from an unoptimized to the optimized one. This new design concept supports the cost-effective mass production of high-speed HMM optical transmitters.

Graphical abstract: Hyperbolic metamaterials for dispersion-assisted directional light emission

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Publication details

The article was received on 10 Feb 2017, accepted on 13 Jun 2017 and first published on 14 Jun 2017


Article type: Paper
DOI: 10.1039/C7NR00980A
Citation: Nanoscale, 2017, Advance Article
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    Hyperbolic metamaterials for dispersion-assisted directional light emission

    L. Ferrari, J. S. T. Smalley, Y. Fainman and Z. Liu, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR00980A

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