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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...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2016
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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. |
format | Online Article Text |
id | pubmed-5031571 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT zhangmingqian plasmonicprobewithcircularnanomoatforfarfieldfreenanofocusing AT wangtianying plasmonicprobewithcircularnanomoatforfarfieldfreenanofocusing |