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Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior

The enhancement of optical characteristics at optical frequencies deviates with the choice of the arrangement of core-shell nanoparticles and their environment. Likewise, the arrangements of core-shell nanoparticles in the air over a substrate or in liquid solution makes them unstable in the atmosph...

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Autores principales: Hayat, Qaisar, Geng, Junping, Liang, Xianling, Jin, Ronghong, Ur Rehman, Sami, He, Chong, Wu, Haobo, Nawaz, Hamza
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7824350/
https://www.ncbi.nlm.nih.gov/pubmed/33406685
http://dx.doi.org/10.3390/nano11010099
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author Hayat, Qaisar
Geng, Junping
Liang, Xianling
Jin, Ronghong
Ur Rehman, Sami
He, Chong
Wu, Haobo
Nawaz, Hamza
author_facet Hayat, Qaisar
Geng, Junping
Liang, Xianling
Jin, Ronghong
Ur Rehman, Sami
He, Chong
Wu, Haobo
Nawaz, Hamza
author_sort Hayat, Qaisar
collection PubMed
description The enhancement of optical characteristics at optical frequencies deviates with the choice of the arrangement of core-shell nanoparticles and their environment. Likewise, the arrangements of core-shell nanoparticles in the air over a substrate or in liquid solution makes them unstable in the atmosphere. This article suggests designing a configuration of an active spherical coated nanoparticle antenna and its extended array in the presence of a passive dielectric, which is proposed to be extendable to construct larger arrays. The issue of instability in the core-shell nanoantenna array models is solved here by inserting the passive dielectric. In addition to this, the inclusion of a dielectric in the array model reports a different directivity behaviour than the conventional array models. We found at first that the combination model of the active coated nanoparticle and passive sphere at the resonant frequency can excite a stronger field with a rotated polarization direction and a propagation direction different from the incident plane-wave. Furthermore, the extended 2D array also rotates the polarization direction and propagation direction for the vertical incident plane-wave. The radiation beam operates strong multipoles in the 2D array plane at resonant frequency (behaving non-conventionally). Nevertheless, it forms a clear main beam in the incident direction when it deviates from the resonance frequency (behaving conventionally). The proposed array model may have possible applications in nano-amplifiers, nano-sensors and other integrated optics.
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spelling pubmed-78243502021-01-24 Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior Hayat, Qaisar Geng, Junping Liang, Xianling Jin, Ronghong Ur Rehman, Sami He, Chong Wu, Haobo Nawaz, Hamza Nanomaterials (Basel) Article The enhancement of optical characteristics at optical frequencies deviates with the choice of the arrangement of core-shell nanoparticles and their environment. Likewise, the arrangements of core-shell nanoparticles in the air over a substrate or in liquid solution makes them unstable in the atmosphere. This article suggests designing a configuration of an active spherical coated nanoparticle antenna and its extended array in the presence of a passive dielectric, which is proposed to be extendable to construct larger arrays. The issue of instability in the core-shell nanoantenna array models is solved here by inserting the passive dielectric. In addition to this, the inclusion of a dielectric in the array model reports a different directivity behaviour than the conventional array models. We found at first that the combination model of the active coated nanoparticle and passive sphere at the resonant frequency can excite a stronger field with a rotated polarization direction and a propagation direction different from the incident plane-wave. Furthermore, the extended 2D array also rotates the polarization direction and propagation direction for the vertical incident plane-wave. The radiation beam operates strong multipoles in the 2D array plane at resonant frequency (behaving non-conventionally). Nevertheless, it forms a clear main beam in the incident direction when it deviates from the resonance frequency (behaving conventionally). The proposed array model may have possible applications in nano-amplifiers, nano-sensors and other integrated optics. MDPI 2021-01-04 /pmc/articles/PMC7824350/ /pubmed/33406685 http://dx.doi.org/10.3390/nano11010099 Text en © 2021 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hayat, Qaisar
Geng, Junping
Liang, Xianling
Jin, Ronghong
Ur Rehman, Sami
He, Chong
Wu, Haobo
Nawaz, Hamza
Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior
title Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior
title_full Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior
title_fullStr Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior
title_full_unstemmed Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior
title_short Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior
title_sort core-shell nano-antenna configurations for array formation with more stability having conventional and non-conventional directivity and propagation behavior
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7824350/
https://www.ncbi.nlm.nih.gov/pubmed/33406685
http://dx.doi.org/10.3390/nano11010099
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