Multimode tunable terahertz absorber based on a quarter graphene disk structure
In this research work, in order to solve the unadjustability of traditional noble metal absorbers to meet the complex application requirements in the actual electromagnetic environment, we designed a simple tunable absorber based on graphene with tunable Fermi level. The performance of the proposed...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379723002139 |
| _version_ | 1827970751264718848 |
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| author | Zhibin Ye Pinghui Wu Hailun Wang Shu Jiang Meng Huang Dongge Lei Fei Wu |
| author_facet | Zhibin Ye Pinghui Wu Hailun Wang Shu Jiang Meng Huang Dongge Lei Fei Wu |
| author_sort | Zhibin Ye |
| collection | DOAJ |
| description | In this research work, in order to solve the unadjustability of traditional noble metal absorbers to meet the complex application requirements in the actual electromagnetic environment, we designed a simple tunable absorber based on graphene with tunable Fermi level. The performance of the proposed absorber is theoretically simulated by the finite difference time domain (FDTD) method. The proposed absorber has two perfect absorption peaks with high efficiency of 99.51% and 99.548% in its working band (90–155 μm). We have performed an in-depth analysis of the causes of perfect absorption and focused on the tunability of the absorber. The absorption frequency can be adjusted by controlling the relaxation time and Fermi level of graphene, and the same purpose can be achieved by changing the refractive index (relative dielectric constant) of the medium. In addition, we also explored the influence of the change of the top structure parameters on the absorption performance. The proposed absorber has the ability to adapt to different electromagnetic environments. In general, it can be flexibly regulated in practical applications, which will provide new possibilities for the development of many fields such as detection and communication. |
| first_indexed | 2024-04-09T18:58:25Z |
| format | Article |
| id | doaj.art-a9f87dc601b04cd8ad0c11f70e9e808b |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-09T18:58:25Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-a9f87dc601b04cd8ad0c11f70e9e808b2023-04-09T05:46:18ZengElsevierResults in Physics2211-37972023-05-0148106420Multimode tunable terahertz absorber based on a quarter graphene disk structureZhibin Ye0Pinghui Wu1Hailun Wang2Shu Jiang3Meng Huang4Dongge Lei5Fei Wu6College of Electrical and Information Engineering, Quzhou University, Quzhou 324000, ChinaResearch Center for Photonic Technology, Fujian Key Laboratory for Advanced Micro-nano Photonics Technology and Devices & Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Fujian 362000, ChinaCollege of Electrical and Information Engineering, Quzhou University, Quzhou 324000, China; Corresponding author.College of Electrical and Information Engineering, Quzhou University, Quzhou 324000, ChinaCollege of Electrical and Information Engineering, Quzhou University, Quzhou 324000, ChinaCollege of Electrical and Information Engineering, Quzhou University, Quzhou 324000, ChinaCollege of Electrical and Information Engineering, Quzhou University, Quzhou 324000, ChinaIn this research work, in order to solve the unadjustability of traditional noble metal absorbers to meet the complex application requirements in the actual electromagnetic environment, we designed a simple tunable absorber based on graphene with tunable Fermi level. The performance of the proposed absorber is theoretically simulated by the finite difference time domain (FDTD) method. The proposed absorber has two perfect absorption peaks with high efficiency of 99.51% and 99.548% in its working band (90–155 μm). We have performed an in-depth analysis of the causes of perfect absorption and focused on the tunability of the absorber. The absorption frequency can be adjusted by controlling the relaxation time and Fermi level of graphene, and the same purpose can be achieved by changing the refractive index (relative dielectric constant) of the medium. In addition, we also explored the influence of the change of the top structure parameters on the absorption performance. The proposed absorber has the ability to adapt to different electromagnetic environments. In general, it can be flexibly regulated in practical applications, which will provide new possibilities for the development of many fields such as detection and communication.http://www.sciencedirect.com/science/article/pii/S2211379723002139GrapheneTunablePerfect absorptionFDTD solutionTerahertz |
| spellingShingle | Zhibin Ye Pinghui Wu Hailun Wang Shu Jiang Meng Huang Dongge Lei Fei Wu Multimode tunable terahertz absorber based on a quarter graphene disk structure Results in Physics Graphene Tunable Perfect absorption FDTD solution Terahertz |
| title | Multimode tunable terahertz absorber based on a quarter graphene disk structure |
| title_full | Multimode tunable terahertz absorber based on a quarter graphene disk structure |
| title_fullStr | Multimode tunable terahertz absorber based on a quarter graphene disk structure |
| title_full_unstemmed | Multimode tunable terahertz absorber based on a quarter graphene disk structure |
| title_short | Multimode tunable terahertz absorber based on a quarter graphene disk structure |
| title_sort | multimode tunable terahertz absorber based on a quarter graphene disk structure |
| topic | Graphene Tunable Perfect absorption FDTD solution Terahertz |
| url | http://www.sciencedirect.com/science/article/pii/S2211379723002139 |
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