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Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure

The permittivity and permeability of a cut-wire sandwich structure can be controlled by laterally shifting the upper and lower layers. The use of this process for designing specific application-oriented devices may lack clear-cut guidelines because the lateral misalignment will significantly change...

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Autores principales: Yudistira, Hadi Teguh, Liu, Shuo, Cui, Tie Jun, Zhang, Han
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6009223/
https://www.ncbi.nlm.nih.gov/pubmed/29977678
http://dx.doi.org/10.3762/bjnano.9.136
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author Yudistira, Hadi Teguh
Liu, Shuo
Cui, Tie Jun
Zhang, Han
author_facet Yudistira, Hadi Teguh
Liu, Shuo
Cui, Tie Jun
Zhang, Han
author_sort Yudistira, Hadi Teguh
collection PubMed
description The permittivity and permeability of a cut-wire sandwich structure can be controlled by laterally shifting the upper and lower layers. The use of this process for designing specific application-oriented devices may lack clear-cut guidelines because the lateral misalignment will significantly change the permittivity and permeability simultaneously. Therefore, in this work, we designed, fabricated and characterized a cut-wire sandwich device capable of tailoring the polarization and magnetization separately, thereby providing a promising recipe for achieving specific application objectives, such as a high-performance absorber. Accumulated charges effectively provided the polarization at the edge of cut-wires, and the surface current density on the cut-wires at top and bottom layers effectively generated the magnetization. By controlling and optimizing the geometrical configurations of the entire sandwich device (without lateral misalignment), the impedance could be matched to that of free space while generating a large imaginary part in the refractive index. This work characterizes the absorption performance of such sandwich structures in the terahertz regime. This mechanism could be further extended to other metamaterial devices in the terahertz and other frequency ranges because polarization and magnetization can now be selectively controlled in a straightforward manner.
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spelling pubmed-60092232018-07-05 Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure Yudistira, Hadi Teguh Liu, Shuo Cui, Tie Jun Zhang, Han Beilstein J Nanotechnol Full Research Paper The permittivity and permeability of a cut-wire sandwich structure can be controlled by laterally shifting the upper and lower layers. The use of this process for designing specific application-oriented devices may lack clear-cut guidelines because the lateral misalignment will significantly change the permittivity and permeability simultaneously. Therefore, in this work, we designed, fabricated and characterized a cut-wire sandwich device capable of tailoring the polarization and magnetization separately, thereby providing a promising recipe for achieving specific application objectives, such as a high-performance absorber. Accumulated charges effectively provided the polarization at the edge of cut-wires, and the surface current density on the cut-wires at top and bottom layers effectively generated the magnetization. By controlling and optimizing the geometrical configurations of the entire sandwich device (without lateral misalignment), the impedance could be matched to that of free space while generating a large imaginary part in the refractive index. This work characterizes the absorption performance of such sandwich structures in the terahertz regime. This mechanism could be further extended to other metamaterial devices in the terahertz and other frequency ranges because polarization and magnetization can now be selectively controlled in a straightforward manner. Beilstein-Institut 2018-05-16 /pmc/articles/PMC6009223/ /pubmed/29977678 http://dx.doi.org/10.3762/bjnano.9.136 Text en Copyright © 2018, Yudistira et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Yudistira, Hadi Teguh
Liu, Shuo
Cui, Tie Jun
Zhang, Han
Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure
title Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure
title_full Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure
title_fullStr Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure
title_full_unstemmed Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure
title_short Tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure
title_sort tailoring polarization and magnetization of absorbing terahertz metamaterials using a cut-wire sandwich structure
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6009223/
https://www.ncbi.nlm.nih.gov/pubmed/29977678
http://dx.doi.org/10.3762/bjnano.9.136
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