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Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure

An optical sensor for magnetic field detection using Ni-subwavelength grating (SWG) on SiO(2)/Ag-thin-film/glass substrates was experimentally developed on the basis of the re-radiation condition of surface-plasmon-polaritons (SPPs) at Ag surfaces. The fabricated sample showed two dips in the reflec...

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Autores principales: Takashima, Yuusuke, Moriiwa, Kohei, Haraguchi, Masanobu, Naoi, Yoshiki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7653930/
https://www.ncbi.nlm.nih.gov/pubmed/33168843
http://dx.doi.org/10.1038/s41598-020-74202-w
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author Takashima, Yuusuke
Moriiwa, Kohei
Haraguchi, Masanobu
Naoi, Yoshiki
author_facet Takashima, Yuusuke
Moriiwa, Kohei
Haraguchi, Masanobu
Naoi, Yoshiki
author_sort Takashima, Yuusuke
collection PubMed
description An optical sensor for magnetic field detection using Ni-subwavelength grating (SWG) on SiO(2)/Ag-thin-film/glass substrates was experimentally developed on the basis of the re-radiation condition of surface-plasmon-polaritons (SPPs) at Ag surfaces. The fabricated sample showed two dips in the reflection spectra associated with SPP excitation, and the optical response exhibited good agreement with that simulated by the finite-difference time-domain method. The reflectivity at one of the dip wavelengths varied minimally with the application of the magnetic field, whereas that at the other dip wavelength significantly decreased owing to the large electric field overlap of SPP with the magnetized Ni-SWG. As a result, a magnetic field on the order of a few mT could be detected with a simple normal-incidence optical system.
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spelling pubmed-76539302020-11-12 Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure Takashima, Yuusuke Moriiwa, Kohei Haraguchi, Masanobu Naoi, Yoshiki Sci Rep Article An optical sensor for magnetic field detection using Ni-subwavelength grating (SWG) on SiO(2)/Ag-thin-film/glass substrates was experimentally developed on the basis of the re-radiation condition of surface-plasmon-polaritons (SPPs) at Ag surfaces. The fabricated sample showed two dips in the reflection spectra associated with SPP excitation, and the optical response exhibited good agreement with that simulated by the finite-difference time-domain method. The reflectivity at one of the dip wavelengths varied minimally with the application of the magnetic field, whereas that at the other dip wavelength significantly decreased owing to the large electric field overlap of SPP with the magnetized Ni-SWG. As a result, a magnetic field on the order of a few mT could be detected with a simple normal-incidence optical system. Nature Publishing Group UK 2020-11-09 /pmc/articles/PMC7653930/ /pubmed/33168843 http://dx.doi.org/10.1038/s41598-020-74202-w Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Takashima, Yuusuke
Moriiwa, Kohei
Haraguchi, Masanobu
Naoi, Yoshiki
Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure
title Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure
title_full Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure
title_fullStr Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure
title_full_unstemmed Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure
title_short Optical detection for magnetic field using Ni-subwavelength grating on SiO(2)/thin-film Ag/glass structure
title_sort optical detection for magnetic field using ni-subwavelength grating on sio(2)/thin-film ag/glass structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7653930/
https://www.ncbi.nlm.nih.gov/pubmed/33168843
http://dx.doi.org/10.1038/s41598-020-74202-w
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