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

Sharp, G. J., Khan, S. I., Khokhar, A. Z., De La Rue, R. M. and Johnson, N. 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)

[img]
Preview
Text
100511.pdf - Published Version
Available under License Creative Commons Attribution.

1MB

Publisher's URL: http://dx.doi.org/10.1088/2053-1591/1/4/045802

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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Johnson, Dr Nigel and Khokhar, Dr Ali and De La Rue, Professor Richard and Khan, Miss Saima and Sharp, Mr Graham
Authors: Sharp, G. J., Khan, S. I., Khokhar, A. Z., De La Rue, R. M., and Johnson, N. P.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Materials Research Express
Publisher:IOP Publishing
ISSN:2053-1591
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in Materials Research Express 1(4):045802
Publisher Policy:Reproduced under a Creative Commons License

University Staff: Request a correction | Enlighten Editors: Update this record

Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
584861EPSRC Doctoral Training Grant 2011-2015Mary Beth KneafseyEngineering & Physical Sciences Research Council (EPSRC)EP/J500434/1VICE PRINCIPAL RESEARCH & ENTERPRISE