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Mode Engineering in Large Arrays of Coupled Plasmonic–Dielectric Nanoantennas

Nasir, Mazhar E.; Krasavin, Alexey V.; Córdova‐Castro, R. Margoth; McPolin, Cillian P. T.; Bouillard, Jean Sebastien G.; Wang, Pan; Zayats, Anatoly V.

Authors

Mazhar E. Nasir

Alexey V. Krasavin

R. Margoth Córdova‐Castro

Cillian P. T. McPolin

Pan Wang

Anatoly V. Zayats



Abstract

Strong electromagnetic field confinement and enhancement can be readily achieved in plasmonic nanoantennas, however, this is considerably more difficult to realize over large areas, which is essential for many applications. Here, dispersion engineering in plasmonic metamaterials is applied to successfully develop and demonstrate a coupled array of plasmonic–dielectric nanoantennas offering an ultrahigh density of electromagnetic hot spots (10 cm ) over macroscopic, centimeter scale areas. The hetero-metamaterial is formed by a highly ordered array of vertically standing plasmonic dipolar antennas with a ZnO gap and fabricated using a scalable electrodeposition technique. It supports a complex modal structure, including guided, surface and gap modes, which offers rich opportunities, frequently beyond the local effective medium theory, with optical properties that can be easily controlled and defined at the fabrication stage. This metamaterial platform can be used in a wide variety of applications, including hot-electron generation, nanoscale light sources, sensors, as well as nonlinear and memristive devices. 11 −2

Citation

Córdova‐Castro, R. M., Krasavin, A. V., Nasir, M. E., Wang, P., Bouillard, J. S. G., McPolin, C. P. T., & Zayats, A. V. (in press). Mode Engineering in Large Arrays of Coupled Plasmonic–Dielectric Nanoantennas. Advanced Optical Materials, https://doi.org/10.1002/adom.202001467

Journal Article Type Article
Acceptance Date Feb 22, 2021
Online Publication Date Mar 19, 2021
Deposit Date Mar 30, 2021
Publicly Available Date Mar 30, 2021
Journal Advanced Optical Materials
Print ISSN 2195-1071
Electronic ISSN 2195-1071
Publisher Wiley
Peer Reviewed Peer Reviewed
Article Number 2001467
DOI https://doi.org/10.1002/adom.202001467
Keywords Electromagnetic hot spots; Field enhancement; Self‐assembled nanoantennas
Public URL https://hull-repository.worktribe.com/output/3743721

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Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/

Copyright Statement
© 2021 The Authors. Advanced Optical Materials published by Wiley‐VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.







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