Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide
With the rapid development of terahertz technology, tunable high-efficiency broadband functional devices have become a research trend. In this research, a dynamically tunable dual broadband terahertz absorber based on the metamaterial structure of vanadium dioxide (VO<sub>2</sub>) is pro...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/20/7259 |
| _version_ | 1827704171281776640 |
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| author | Xiao-Fei Jiao Zi-Heng Zhang Tong Li Yun Xu Guo-Feng Song |
| author_facet | Xiao-Fei Jiao Zi-Heng Zhang Tong Li Yun Xu Guo-Feng Song |
| author_sort | Xiao-Fei Jiao |
| collection | DOAJ |
| description | With the rapid development of terahertz technology, tunable high-efficiency broadband functional devices have become a research trend. In this research, a dynamically tunable dual broadband terahertz absorber based on the metamaterial structure of vanadium dioxide (VO<sub>2</sub>) is proposed and analyzed. The metamaterial is composed of patterned VO<sub>2</sub> on the top layer, gold on the bottom layer and silicon dioxide (SiO<sub>2</sub>) as the middle dielectric layer. Simulation results show that two bandwidths of 90% absorption reach as wide as 2.32 THz from 1.87 to 4.19 THz and 2.03 THz from 8.70 to 10.73 THz under normal incidence. By changing the conductivity of VO<sub>2</sub>, the absorptance dynamically tuned from 2% to 94%. Moreover, it is verified that absorptance is insensitive to the polarization angle. The physical origin of this absorber is revealed through interference theory and matching impedance theory. We further investigate the physical mechanism of dual broadband absorption through electric field analysis. This design has potential applications in imaging, modulation and stealth technology. |
| first_indexed | 2024-03-10T15:33:59Z |
| format | Article |
| id | doaj.art-dba88e4e9b1940a5800362519ac2ff95 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T15:33:59Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-dba88e4e9b1940a5800362519ac2ff952023-11-20T17:27:57ZengMDPI AGApplied Sciences2076-34172020-10-011020725910.3390/app10207259Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium DioxideXiao-Fei Jiao0Zi-Heng Zhang1Tong Li2Yun Xu3Guo-Feng Song4Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaSchool of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha 410004, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaInstitute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, ChinaWith the rapid development of terahertz technology, tunable high-efficiency broadband functional devices have become a research trend. In this research, a dynamically tunable dual broadband terahertz absorber based on the metamaterial structure of vanadium dioxide (VO<sub>2</sub>) is proposed and analyzed. The metamaterial is composed of patterned VO<sub>2</sub> on the top layer, gold on the bottom layer and silicon dioxide (SiO<sub>2</sub>) as the middle dielectric layer. Simulation results show that two bandwidths of 90% absorption reach as wide as 2.32 THz from 1.87 to 4.19 THz and 2.03 THz from 8.70 to 10.73 THz under normal incidence. By changing the conductivity of VO<sub>2</sub>, the absorptance dynamically tuned from 2% to 94%. Moreover, it is verified that absorptance is insensitive to the polarization angle. The physical origin of this absorber is revealed through interference theory and matching impedance theory. We further investigate the physical mechanism of dual broadband absorption through electric field analysis. This design has potential applications in imaging, modulation and stealth technology.https://www.mdpi.com/2076-3417/10/20/7259terahertzmetamaterialvanadium dioxideperfect absorber |
| spellingShingle | Xiao-Fei Jiao Zi-Heng Zhang Tong Li Yun Xu Guo-Feng Song Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide Applied Sciences terahertz metamaterial vanadium dioxide perfect absorber |
| title | Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide |
| title_full | Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide |
| title_fullStr | Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide |
| title_full_unstemmed | Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide |
| title_short | Tunable Dual Broadband Terahertz Metamaterial Absorber Based on Vanadium Dioxide |
| title_sort | tunable dual broadband terahertz metamaterial absorber based on vanadium dioxide |
| topic | terahertz metamaterial vanadium dioxide perfect absorber |
| url | https://www.mdpi.com/2076-3417/10/20/7259 |
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