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Issue 26, 2017
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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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Article information


Submitted
10 Feb 2017
Accepted
13 Jun 2017
First published
14 Jun 2017

Nanoscale, 2017,9, 9034-9048
Article type
Paper

Hyperbolic metamaterials for dispersion-assisted directional light emission

L. Ferrari, J. S. T. Smalley, Y. Fainman and Z. Liu, Nanoscale, 2017, 9, 9034
DOI: 10.1039/C7NR00980A

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