Directional excitation of surface plasmon using multi-mode interference in an aperture

Abstract Plasmonics is a promising technology that can find many applications in nanophotonics and biosensing. Local excitation of surface plasmons with high directionality is required for many of these applications. We demonstrate that by controlling the interference of light in a metal slot with t...

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Autores principales:	M. Z. Alam, Z. Yang, M. Sheik-Bahae, J. S. Aitchison, M. Mojahedi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2fd4e512ac8f40c59fb04647a8278285
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spelling	oai:doaj.org-article:2fd4e512ac8f40c59fb04647a82782852021-12-02T14:06:56ZDirectional excitation of surface plasmon using multi-mode interference in an aperture10.1038/s41598-020-78594-72045-2322https://doaj.org/article/2fd4e512ac8f40c59fb04647a82782852021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78594-7https://doaj.org/toc/2045-2322Abstract Plasmonics is a promising technology that can find many applications in nanophotonics and biosensing. Local excitation of surface plasmons with high directionality is required for many of these applications. We demonstrate that by controlling the interference of light in a metal slot with the adjustment of the angle of incidence, it is possible to achieve highly directional surface plasmon excitation. Our numerical analysis of the structure showing a strong directionality of excited surface plasmon is confirmed by near field scanning measurements. The proposed structure can be useful for many applications including excitation of plasmonic waveguides, nanolithography, and optical sensing. To illustrate its usefulness, we experimentally demonstrate that it can be used for highly directional excitation of a dielectric loaded plasmonic waveguide. We also propose a simple structure for surface plasmon interference lithography capable of providing high image contrast using this scheme.M. Z. AlamZ. YangM. Sheik-BahaeJ. S. AitchisonM. MojahediNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Z. Alam Z. Yang M. Sheik-Bahae J. S. Aitchison M. Mojahedi Directional excitation of surface plasmon using multi-mode interference in an aperture
description	Abstract Plasmonics is a promising technology that can find many applications in nanophotonics and biosensing. Local excitation of surface plasmons with high directionality is required for many of these applications. We demonstrate that by controlling the interference of light in a metal slot with the adjustment of the angle of incidence, it is possible to achieve highly directional surface plasmon excitation. Our numerical analysis of the structure showing a strong directionality of excited surface plasmon is confirmed by near field scanning measurements. The proposed structure can be useful for many applications including excitation of plasmonic waveguides, nanolithography, and optical sensing. To illustrate its usefulness, we experimentally demonstrate that it can be used for highly directional excitation of a dielectric loaded plasmonic waveguide. We also propose a simple structure for surface plasmon interference lithography capable of providing high image contrast using this scheme.
format	article
author	M. Z. Alam Z. Yang M. Sheik-Bahae J. S. Aitchison M. Mojahedi
author_facet	M. Z. Alam Z. Yang M. Sheik-Bahae J. S. Aitchison M. Mojahedi
author_sort	M. Z. Alam
title	Directional excitation of surface plasmon using multi-mode interference in an aperture
title_short	Directional excitation of surface plasmon using multi-mode interference in an aperture
title_full	Directional excitation of surface plasmon using multi-mode interference in an aperture
title_fullStr	Directional excitation of surface plasmon using multi-mode interference in an aperture
title_full_unstemmed	Directional excitation of surface plasmon using multi-mode interference in an aperture
title_sort	directional excitation of surface plasmon using multi-mode interference in an aperture
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2fd4e512ac8f40c59fb04647a8278285
work_keys_str_mv	AT mzalam directionalexcitationofsurfaceplasmonusingmultimodeinterferenceinanaperture AT zyang directionalexcitationofsurfaceplasmonusingmultimodeinterferenceinanaperture AT msheikbahae directionalexcitationofsurfaceplasmonusingmultimodeinterferenceinanaperture AT jsaitchison directionalexcitationofsurfaceplasmonusingmultimodeinterferenceinanaperture AT mmojahedi directionalexcitationofsurfaceplasmonusingmultimodeinterferenceinanaperture
_version_	1718391953194745856

Directional excitation of surface plasmon using multi-mode interference in an aperture

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