Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface
We propose a tunable terahertz (THz) absorber design that utilizes a bulk Dirac semimetal (BDS)-based metasurface. The absorber consists of a BDS film with a periodic ring slot, dielectric layer, and fully reflective gold mirror. Simulations indicate that localized surface plasmon resonance is excit...
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IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8440710/ |
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| author | Yannan Jiang Wan Xinguo Jiao Wang Jia Wang |
| author_facet | Yannan Jiang Wan Xinguo Jiao Wang Jia Wang |
| author_sort | Yannan Jiang |
| collection | DOAJ |
| description | We propose a tunable terahertz (THz) absorber design that utilizes a bulk Dirac semimetal (BDS)-based metasurface. The absorber consists of a BDS film with a periodic ring slot, dielectric layer, and fully reflective gold mirror. Simulations indicate that localized surface plasmon resonance is excited within certain regions close to the ring slot, leading to dipolar plasmon resonance of periodic arrays along the polarization direction, thereby producing resonant absorption. The BDS conductivity scales linearly with the Fermi level that can be tuned by bias application, enhancing the electromagnetic-field concentration and shrinking the effective current path, thereby blue-shifting the operating frequency within an ultrawideband. The thickness of the proposed design is significantly less than the resonant wavelength; therefore, the design yields an ultrathin metasurface absorber. This paper may lead to the investigations of the tunable metasurface device based on the BDS. |
| format | Article |
| id | doaj-art-be53fcd4042843de98d1c2ce7799e25d |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-be53fcd4042843de98d1c2ce7799e25d2025-08-20T03:15:48ZengIEEEIEEE Photonics Journal1943-06552018-01-011051710.1109/JPHOT.2018.28662818440710Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal MetasurfaceYannan Jiang0https://orcid.org/0000-0003-2582-7488Wan Xinguo1Jiao Wang2https://orcid.org/0000-0002-7127-6640Jia Wang3Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin, ChinaGuangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin, ChinaGuangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, Guilin, ChinaSchool of Computer Science and Engineering, Southeast University, Nanjing, ChinaWe propose a tunable terahertz (THz) absorber design that utilizes a bulk Dirac semimetal (BDS)-based metasurface. The absorber consists of a BDS film with a periodic ring slot, dielectric layer, and fully reflective gold mirror. Simulations indicate that localized surface plasmon resonance is excited within certain regions close to the ring slot, leading to dipolar plasmon resonance of periodic arrays along the polarization direction, thereby producing resonant absorption. The BDS conductivity scales linearly with the Fermi level that can be tuned by bias application, enhancing the electromagnetic-field concentration and shrinking the effective current path, thereby blue-shifting the operating frequency within an ultrawideband. The thickness of the proposed design is significantly less than the resonant wavelength; therefore, the design yields an ultrathin metasurface absorber. This paper may lead to the investigations of the tunable metasurface device based on the BDS.https://ieeexplore.ieee.org/document/8440710/Absorbermetasurfacebulk Dirac semimetal (BDS). |
| spellingShingle | Yannan Jiang Wan Xinguo Jiao Wang Jia Wang Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface IEEE Photonics Journal Absorber metasurface bulk Dirac semimetal (BDS). |
| title | Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface |
| title_full | Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface |
| title_fullStr | Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface |
| title_full_unstemmed | Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface |
| title_short | Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface |
| title_sort | tunable terahertz absorber based on bulk dirac semimetal metasurface |
| topic | Absorber metasurface bulk Dirac semimetal (BDS). |
| url | https://ieeexplore.ieee.org/document/8440710/ |
| work_keys_str_mv | AT yannanjiang tunableterahertzabsorberbasedonbulkdiracsemimetalmetasurface AT wanxinguo tunableterahertzabsorberbasedonbulkdiracsemimetalmetasurface AT jiaowang tunableterahertzabsorberbasedonbulkdiracsemimetalmetasurface AT jiawang tunableterahertzabsorberbasedonbulkdiracsemimetalmetasurface |