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Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure

Due to their narrow beam waist size, high intensity, and long propagation distance, photonic nanojets (PNJs) can be used in various fields such as nanoparticle sensing, optical subwavelength detection, and optical data storage. In this paper, we report a strategy to realize an SPP-PNJ by exciting a...

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Detalles Bibliográficos
Autores principales: Zeng, Xintao, Su, Ning, Zhang, Weiming, Ye, Zhibin, Wu, Pinghui, Liu, Bin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10146357/
https://www.ncbi.nlm.nih.gov/pubmed/37109982
http://dx.doi.org/10.3390/ma16083146
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author Zeng, Xintao
Su, Ning
Zhang, Weiming
Ye, Zhibin
Wu, Pinghui
Liu, Bin
author_facet Zeng, Xintao
Su, Ning
Zhang, Weiming
Ye, Zhibin
Wu, Pinghui
Liu, Bin
author_sort Zeng, Xintao
collection PubMed
description Due to their narrow beam waist size, high intensity, and long propagation distance, photonic nanojets (PNJs) can be used in various fields such as nanoparticle sensing, optical subwavelength detection, and optical data storage. In this paper, we report a strategy to realize an SPP-PNJ by exciting a surface plasmon polariton (SPP) on a gold-film dielectric microdisk. In detail, an SPP is excited by the grating–coupling method, then it irradiates the dielectric microdisk to form an SPP-PNJ. The characteristics of the SPP-PNJ, including maximum intensity, full width at half maximum (FWHM), and propagation distance, are studied by using finite difference time domain (FDTD) numerical solutions. The results demonstrate that the proposed structure can produce a high-quality SPP-PNJ, the maximum quality factor of which is 62.20, and the propagation distance of the SPP-PNJ is 3.08 λ. Furthermore, the properties of the SPP-PNJ can be modified flexibly by changing the thickness and refractive index of the dielectric microdisk.
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spelling pubmed-101463572023-04-29 Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure Zeng, Xintao Su, Ning Zhang, Weiming Ye, Zhibin Wu, Pinghui Liu, Bin Materials (Basel) Article Due to their narrow beam waist size, high intensity, and long propagation distance, photonic nanojets (PNJs) can be used in various fields such as nanoparticle sensing, optical subwavelength detection, and optical data storage. In this paper, we report a strategy to realize an SPP-PNJ by exciting a surface plasmon polariton (SPP) on a gold-film dielectric microdisk. In detail, an SPP is excited by the grating–coupling method, then it irradiates the dielectric microdisk to form an SPP-PNJ. The characteristics of the SPP-PNJ, including maximum intensity, full width at half maximum (FWHM), and propagation distance, are studied by using finite difference time domain (FDTD) numerical solutions. The results demonstrate that the proposed structure can produce a high-quality SPP-PNJ, the maximum quality factor of which is 62.20, and the propagation distance of the SPP-PNJ is 3.08 λ. Furthermore, the properties of the SPP-PNJ can be modified flexibly by changing the thickness and refractive index of the dielectric microdisk. MDPI 2023-04-16 /pmc/articles/PMC10146357/ /pubmed/37109982 http://dx.doi.org/10.3390/ma16083146 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zeng, Xintao
Su, Ning
Zhang, Weiming
Ye, Zhibin
Wu, Pinghui
Liu, Bin
Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure
title Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure
title_full Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure
title_fullStr Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure
title_full_unstemmed Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure
title_short Generation of Photonic Nanojet Using Gold Film Dielectric Microdisk Structure
title_sort generation of photonic nanojet using gold film dielectric microdisk structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10146357/
https://www.ncbi.nlm.nih.gov/pubmed/37109982
http://dx.doi.org/10.3390/ma16083146
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