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Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing

In this work, a metallic probe with a sharp tip and two half-circular nanostructures on its base is introduced and investigated. The proposed design aims at improving the detection performance of a probe for scattering scanning near-field optical microscopy in terms of enhanced signal-to-noise ratio...

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Detalles Bibliográficos
Autores principales: Zhang, Mingqian, Wang, Tianying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5031571/
https://www.ncbi.nlm.nih.gov/pubmed/27654281
http://dx.doi.org/10.1186/s11671-016-1619-y
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author Zhang, Mingqian
Wang, Tianying
author_facet Zhang, Mingqian
Wang, Tianying
author_sort Zhang, Mingqian
collection PubMed
description In this work, a metallic probe with a sharp tip and two half-circular nanostructures on its base is introduced and investigated. The proposed design aims at improving the detection performance of a probe for scattering scanning near-field optical microscopy in terms of enhanced signal-to-noise ratio. Under the premise of processing feasibility, the structure of the probe is designed and optimized with three-dimensional finite-difference time-domain method. And then the performance and optical property of the probe are theoretically investigated and experimentally demonstrated using a scanning near-field optical microscope with aperture probe. It is indicated that a tightly confined optical field with significantly reduced far-field background can be achieved at the tip apex of the probe.
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spelling pubmed-50315712016-10-03 Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing Zhang, Mingqian Wang, Tianying Nanoscale Res Lett Nano Express In this work, a metallic probe with a sharp tip and two half-circular nanostructures on its base is introduced and investigated. The proposed design aims at improving the detection performance of a probe for scattering scanning near-field optical microscopy in terms of enhanced signal-to-noise ratio. Under the premise of processing feasibility, the structure of the probe is designed and optimized with three-dimensional finite-difference time-domain method. And then the performance and optical property of the probe are theoretically investigated and experimentally demonstrated using a scanning near-field optical microscope with aperture probe. It is indicated that a tightly confined optical field with significantly reduced far-field background can be achieved at the tip apex of the probe. Springer US 2016-09-22 /pmc/articles/PMC5031571/ /pubmed/27654281 http://dx.doi.org/10.1186/s11671-016-1619-y Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Zhang, Mingqian
Wang, Tianying
Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing
title Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing
title_full Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing
title_fullStr Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing
title_full_unstemmed Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing
title_short Plasmonic Probe With Circular Nano-Moat for far-Field Free Nanofocusing
title_sort plasmonic probe with circular nano-moat for far-field free nanofocusing
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5031571/
https://www.ncbi.nlm.nih.gov/pubmed/27654281
http://dx.doi.org/10.1186/s11671-016-1619-y
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