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Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting
We propose a wide-band metamaterial perfect absorber (MPA), using the coupling in the near-field of a quadruple split-ring resonator concentric with crossed ellipses. We designed the MPA with a metal–insulator-metal (MIM) structure for use in thermal energy harvesting. A gradient-based optimization...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7529747/ https://www.ncbi.nlm.nih.gov/pubmed/33004962 http://dx.doi.org/10.1038/s41598-020-73368-7 |
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author | Elsharabasy, Ahmed Bakr, Mohamed Deen, M. Jamal |
author_facet | Elsharabasy, Ahmed Bakr, Mohamed Deen, M. Jamal |
author_sort | Elsharabasy, Ahmed |
collection | PubMed |
description | We propose a wide-band metamaterial perfect absorber (MPA), using the coupling in the near-field of a quadruple split-ring resonator concentric with crossed ellipses. We designed the MPA with a metal–insulator-metal (MIM) structure for use in thermal energy harvesting. A gradient-based optimization approach was carried out to maximize the absorption of infrared (IR) radiation around 10 μm. Owing to the near-field coupling of resonators with optimal design parameters, the peaks of the absorption responses approach each other, thus broadening the overall bandwidth with almost unity absorptivity. The proposed design has a resonance at 10 μm resulting from magnetic polaritons (MPs) and thus maintains high absorption above 99% up to a range of incident-angles greater than 60° and exhibits a polarization-free behavior due to symmetry. When the optimal design was numerically examined to fabrication tolerances, it showed negligible sensitivities in the absorptivity with respect to design parameters. The strong electric field enhancement inside the split-ring gaps and between the ends of the cross arms and the surrounding ring enables designing MIM diodes to rectify the harvested thermal radiations at 288 K. MIM diodes can be built by the deposition of thin insulators to sit in these gaps. The MIM diode and MPA work together to harvest and rectify the incident IR radiation in a manner similar to the operation of rectennas. The MPA outperforms the traditional nano-antennas in impedance matching efficiency because of its higher resistance. Also, its dual-polarization reception capability doubles the rectenna efficiency. Our proposed MPA retained absorptivity more than 99% when coupled with MIM diodes whose resistances are in the range of 500 Ω–1 MΩ. |
format | Online Article Text |
id | pubmed-7529747 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-75297472020-10-02 Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting Elsharabasy, Ahmed Bakr, Mohamed Deen, M. Jamal Sci Rep Article We propose a wide-band metamaterial perfect absorber (MPA), using the coupling in the near-field of a quadruple split-ring resonator concentric with crossed ellipses. We designed the MPA with a metal–insulator-metal (MIM) structure for use in thermal energy harvesting. A gradient-based optimization approach was carried out to maximize the absorption of infrared (IR) radiation around 10 μm. Owing to the near-field coupling of resonators with optimal design parameters, the peaks of the absorption responses approach each other, thus broadening the overall bandwidth with almost unity absorptivity. The proposed design has a resonance at 10 μm resulting from magnetic polaritons (MPs) and thus maintains high absorption above 99% up to a range of incident-angles greater than 60° and exhibits a polarization-free behavior due to symmetry. When the optimal design was numerically examined to fabrication tolerances, it showed negligible sensitivities in the absorptivity with respect to design parameters. The strong electric field enhancement inside the split-ring gaps and between the ends of the cross arms and the surrounding ring enables designing MIM diodes to rectify the harvested thermal radiations at 288 K. MIM diodes can be built by the deposition of thin insulators to sit in these gaps. The MIM diode and MPA work together to harvest and rectify the incident IR radiation in a manner similar to the operation of rectennas. The MPA outperforms the traditional nano-antennas in impedance matching efficiency because of its higher resistance. Also, its dual-polarization reception capability doubles the rectenna efficiency. Our proposed MPA retained absorptivity more than 99% when coupled with MIM diodes whose resistances are in the range of 500 Ω–1 MΩ. Nature Publishing Group UK 2020-10-01 /pmc/articles/PMC7529747/ /pubmed/33004962 http://dx.doi.org/10.1038/s41598-020-73368-7 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 Elsharabasy, Ahmed Bakr, Mohamed Deen, M. Jamal Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting |
title | Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting |
title_full | Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting |
title_fullStr | Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting |
title_full_unstemmed | Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting |
title_short | Wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting |
title_sort | wide-angle, wide-band, polarization-insensitive metamaterial absorber for thermal energy harvesting |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7529747/ https://www.ncbi.nlm.nih.gov/pubmed/33004962 http://dx.doi.org/10.1038/s41598-020-73368-7 |
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