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Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons
A novel metamaterial structure consisting of multiple graphene/dielectric layers and metallic substrate is proposed to achieve the broadband absorption response at terahertz (THz) frequencies. Utilizing the phase modulation effect generated by graphene ribbons, the bright-dark field is formed to sup...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5696529/ https://www.ncbi.nlm.nih.gov/pubmed/29158569 http://dx.doi.org/10.1038/s41598-017-16220-9 |
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author | Chen, Dingbo Yang, Junbo Zhang, Jingjing Huang, Jie Zhang, Zhaojian |
author_facet | Chen, Dingbo Yang, Junbo Zhang, Jingjing Huang, Jie Zhang, Zhaojian |
author_sort | Chen, Dingbo |
collection | PubMed |
description | A novel metamaterial structure consisting of multiple graphene/dielectric layers and metallic substrate is proposed to achieve the broadband absorption response at terahertz (THz) frequencies. Utilizing the phase modulation effect generated by graphene ribbons, the bright-dark field is formed to suppress the reflection based on interference theory in a wide period. By irregularly stacking four graphene ribbons of varying widths on four dielectric layers with unequal thickness in a period, we merge successive absorption peaks into a broadband absorption spectrum successfully. The absorption decreases with fluctuations as the incident angle increases. The position of the absorption spectrum can be dynamically tuned by a small change in the Fermi level of graphene instead of re-optimizing and re-fabricating the device. In addition, the bandwidth of the absorber can be further improved by means of increasing the graphene/dielectric layers. The structure proposed in this paper has potential applications in tunable terahertz photonic devices such as dynamic broadband filters, modulators and sensors. |
format | Online Article Text |
id | pubmed-5696529 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56965292017-11-29 Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons Chen, Dingbo Yang, Junbo Zhang, Jingjing Huang, Jie Zhang, Zhaojian Sci Rep Article A novel metamaterial structure consisting of multiple graphene/dielectric layers and metallic substrate is proposed to achieve the broadband absorption response at terahertz (THz) frequencies. Utilizing the phase modulation effect generated by graphene ribbons, the bright-dark field is formed to suppress the reflection based on interference theory in a wide period. By irregularly stacking four graphene ribbons of varying widths on four dielectric layers with unequal thickness in a period, we merge successive absorption peaks into a broadband absorption spectrum successfully. The absorption decreases with fluctuations as the incident angle increases. The position of the absorption spectrum can be dynamically tuned by a small change in the Fermi level of graphene instead of re-optimizing and re-fabricating the device. In addition, the bandwidth of the absorber can be further improved by means of increasing the graphene/dielectric layers. The structure proposed in this paper has potential applications in tunable terahertz photonic devices such as dynamic broadband filters, modulators and sensors. Nature Publishing Group UK 2017-11-20 /pmc/articles/PMC5696529/ /pubmed/29158569 http://dx.doi.org/10.1038/s41598-017-16220-9 Text en © The Author(s) 2017 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Chen, Dingbo Yang, Junbo Zhang, Jingjing Huang, Jie Zhang, Zhaojian Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons |
title | Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons |
title_full | Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons |
title_fullStr | Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons |
title_full_unstemmed | Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons |
title_short | Section 1Tunable broadband terahertz absorbers based on multiple layers of graphene ribbons |
title_sort | section 1tunable broadband terahertz absorbers based on multiple layers of graphene ribbons |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5696529/ https://www.ncbi.nlm.nih.gov/pubmed/29158569 http://dx.doi.org/10.1038/s41598-017-16220-9 |
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