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Negative index fishnet with nanopillars formed by direct nano-imprint lithography

Negative index fishnet with nanopillars formed by direct nano-imprint lithography
Negative index fishnet with nanopillars formed by direct nano-imprint lithography
In this paper we demonstrate the ability to fabricate fishnets by nanoimprinting directly into a pre-deposited three layer metal-dielectric-metal stack, enabling us to pattern large areas in two minutes. We have designed and fabricated two different fishnet structures of varying dimensions using this method and measured their resonant wavelengths in the near-infrared at 1.45 µm and 1.88 µm. An important by-product of directly imprinting into the metal-dielectric stack, without separation from the substrate, is the formation of rectangular nanopillars that sit within the rectangular apertures between the fishnet slabs. Simulations complement our measurements and suggest a negative refractive index real part with a magnitude of 1.6. Further simulations suggest that if the fishnet were to be detached from the supporting substrate a refractive index real part of 5 and FOM of 2.74 could be obtained.
Sharp, Graham J.
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Khan, Saima I.
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Khokhar, Ali Z.
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De La Rue, Richard M.
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Johnson, Nigel P.
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Sharp, Graham J.
e73b6ecf-d884-42b5-afd3-fb1913cbbaaa
Khan, Saima I.
2b5b32d7-f43b-444f-a3de-d46af8ade246
Khokhar, Ali Z.
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
De La Rue, Richard M.
5000f6a1-f91f-44f1-896b-11c08199c6db
Johnson, Nigel P.
f20bef05-0a50-47dc-83f7-b03c5eb750a6

Sharp, Graham J., Khan, Saima I., Khokhar, Ali Z., De La Rue, Richard M. and Johnson, Nigel P. (2014) Negative index fishnet with nanopillars formed by direct nano-imprint lithography. Materials Research Express, 1 (4), [045802]. (doi:10.1088/2053-1591/1/4/045802).

Record type: Article

Abstract

In this paper we demonstrate the ability to fabricate fishnets by nanoimprinting directly into a pre-deposited three layer metal-dielectric-metal stack, enabling us to pattern large areas in two minutes. We have designed and fabricated two different fishnet structures of varying dimensions using this method and measured their resonant wavelengths in the near-infrared at 1.45 µm and 1.88 µm. An important by-product of directly imprinting into the metal-dielectric stack, without separation from the substrate, is the formation of rectangular nanopillars that sit within the rectangular apertures between the fishnet slabs. Simulations complement our measurements and suggest a negative refractive index real part with a magnitude of 1.6. Further simulations suggest that if the fishnet were to be detached from the supporting substrate a refractive index real part of 5 and FOM of 2.74 could be obtained.

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Published date: 10 December 2014

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Local EPrints ID: 441549
URI: http://eprints.soton.ac.uk/id/eprint/441549
PURE UUID: d046fd84-62ea-497d-82e6-5b10b22136c7

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Date deposited: 17 Jun 2020 16:31
Last modified: 16 Mar 2024 08:16

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Contributors

Author: Graham J. Sharp
Author: Saima I. Khan
Author: Ali Z. Khokhar
Author: Richard M. De La Rue
Author: Nigel P. Johnson

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