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Design optimization of gold-coated fiber tips with embedded plasmonic slot nano-resonators

Design optimization of gold-coated fiber tips with embedded plasmonic slot nano-resonators
Design optimization of gold-coated fiber tips with embedded plasmonic slot nano-resonators
Nanostructures of dimensions around the operating wavelength of light can support optical resonances enhancing the incident light by orders of magnitude and concentrating it in the nanoscale. Their integration to optical fiber tips with thin metallic claddings, forming plasmonic slot nanoresonators (PSNRs), provides ease of light coupling from the fiber’s core modes to the slot and a robust platform which can find many applications in nano-optics and sensing. Guiding and modal properties of metal-coated optical fiber tips with embedded PSNRs are investigated through finite element method (FEM) simulations towards the identification of their optimization parameters. It was found that the placement of a PSNR at the cut-off radius of a metal-coated fiber tip, where the group velocity tends to zero, leads to considerable intensity enhancement of the field confined beyond the diffraction limit. Maximum intensity enhancement of optimally placed PSNRs at different radii shows a linear dependence between excitation wavelength and radius, making it feasible to engineer the proper radius for a specific wavelength for maximum enhancement.
2040-8986
Petropoulou, Afroditi
2f9ad2f6-6eb2-474b-ac96-81fb1136cc54
Zervas, Michael
1840a474-dd50-4a55-ab74-6f086aa3f701
Riziotis, Christos
54e7bee6-b9e1-46e8-85ac-886fd0298cbe
Petropoulou, Afroditi
2f9ad2f6-6eb2-474b-ac96-81fb1136cc54
Zervas, Michael
1840a474-dd50-4a55-ab74-6f086aa3f701
Riziotis, Christos
54e7bee6-b9e1-46e8-85ac-886fd0298cbe

Petropoulou, Afroditi, Zervas, Michael and Riziotis, Christos (2017) Design optimization of gold-coated fiber tips with embedded plasmonic slot nano-resonators. Journal of Optics, 19 (5), [055002]. (doi:10.1088/2040-8986/aa6356).

Record type: Article

Abstract

Nanostructures of dimensions around the operating wavelength of light can support optical resonances enhancing the incident light by orders of magnitude and concentrating it in the nanoscale. Their integration to optical fiber tips with thin metallic claddings, forming plasmonic slot nanoresonators (PSNRs), provides ease of light coupling from the fiber’s core modes to the slot and a robust platform which can find many applications in nano-optics and sensing. Guiding and modal properties of metal-coated optical fiber tips with embedded PSNRs are investigated through finite element method (FEM) simulations towards the identification of their optimization parameters. It was found that the placement of a PSNR at the cut-off radius of a metal-coated fiber tip, where the group velocity tends to zero, leads to considerable intensity enhancement of the field confined beyond the diffraction limit. Maximum intensity enhancement of optimally placed PSNRs at different radii shows a linear dependence between excitation wavelength and radius, making it feasible to engineer the proper radius for a specific wavelength for maximum enhancement.

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JOpt 19 055002 2017 Petropoulou Zervas - Version of Record
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Accepted/In Press date: 28 February 2017
e-pub ahead of print date: 30 March 2017
Published date: 30 March 2017

Identifiers

Local EPrints ID: 413700
URI: http://eprints.soton.ac.uk/id/eprint/413700
ISSN: 2040-8986
PURE UUID: f6161e72-2af4-4f35-b6f3-6edecd6e7f84
ORCID for Michael Zervas: ORCID iD orcid.org/0000-0002-0651-4059

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Date deposited: 31 Aug 2017 16:31
Last modified: 28 Apr 2022 01:35

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Contributors

Author: Afroditi Petropoulou
Author: Michael Zervas ORCID iD
Author: Christos Riziotis

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