Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics
A dual-function switchable terahertz (THz) device is proposed. Based on the phase transition of vanadium dioxide (VO2), dynamic switching between broadband absorption and polarization conversion is obtained. By manipulating the conductivity of photosensitive silicon through laser pumping, dynamic mo...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379723000396 |
| _version_ | 1797924717290586112 |
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| author | Tianli Dong Ying Zhang You Li Yupei Tang Xunjun He |
| author_facet | Tianli Dong Ying Zhang You Li Yupei Tang Xunjun He |
| author_sort | Tianli Dong |
| collection | DOAJ |
| description | A dual-function switchable terahertz (THz) device is proposed. Based on the phase transition of vanadium dioxide (VO2), dynamic switching between broadband absorption and polarization conversion is obtained. By manipulating the conductivity of photosensitive silicon through laser pumping, dynamic modulation of the amplitude in both functions is realized at the same time. Unlike the previous ones, the entire structure of the device consists of seven layers. When VO2 is in the metallic phase, our device is a broadband absorber. In frequency range of 0.78–1.81 THz, a broadband absorption with a relative bandwidth of 80% is achieved. Dynamic tuning of the absorption amplitude is achieved by changing the conductivity of the silicon, and the modulation depth is 74%. When VO2 is in the insulating phase, our device can be used as a polarization converter. In frequency range of 0.51–1.45 THz, cross-polarization conversion ratio is over 90%, and the relative bandwidth is up to 96%. Similarly, dynamic tuning of the polarization intensity is obtained, and the modulation depth is 89%. Compared with the previously reported ones, our device can achieve dynamical switching between the two functions, as well as dynamic tuning of performance at the same time, which offers a wide range of possible applications in sensors, detectors, solar cells, etc. |
| first_indexed | 2024-04-10T15:05:31Z |
| format | Article |
| id | doaj.art-8ed6e088c68e473c9315631580272371 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-10T15:05:31Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-8ed6e088c68e473c93156315802723712023-02-15T04:27:59ZengElsevierResults in Physics2211-37972023-02-0145106246Dual-function switchable terahertz metamaterial device with dynamic tuning characteristicsTianli Dong0Ying Zhang1You Li2Yupei Tang3Xunjun He4School of Science, Harbin University of Science and Technology, Harbin 150080, ChinaSchool of Science, Harbin University of Science and Technology, Harbin 150080, China; State Key Laboratory Breeding Base of Dielectric Engineering, Harbin University of Science and Technology, Harbin 150080, China; Corresponding author at: School of Science, Harbin University of Science and Technology, Harbin 150080, China.State Key Laboratory Breeding Base of Dielectric Engineering, Harbin University of Science and Technology, Harbin 150080, China; Harbin Research Institute of Electrical Instruments, Harbin 150080, ChinaSchool of Science, Harbin University of Science and Technology, Harbin 150080, ChinaState Key Laboratory Breeding Base of Dielectric Engineering, Harbin University of Science and Technology, Harbin 150080, ChinaA dual-function switchable terahertz (THz) device is proposed. Based on the phase transition of vanadium dioxide (VO2), dynamic switching between broadband absorption and polarization conversion is obtained. By manipulating the conductivity of photosensitive silicon through laser pumping, dynamic modulation of the amplitude in both functions is realized at the same time. Unlike the previous ones, the entire structure of the device consists of seven layers. When VO2 is in the metallic phase, our device is a broadband absorber. In frequency range of 0.78–1.81 THz, a broadband absorption with a relative bandwidth of 80% is achieved. Dynamic tuning of the absorption amplitude is achieved by changing the conductivity of the silicon, and the modulation depth is 74%. When VO2 is in the insulating phase, our device can be used as a polarization converter. In frequency range of 0.51–1.45 THz, cross-polarization conversion ratio is over 90%, and the relative bandwidth is up to 96%. Similarly, dynamic tuning of the polarization intensity is obtained, and the modulation depth is 89%. Compared with the previously reported ones, our device can achieve dynamical switching between the two functions, as well as dynamic tuning of performance at the same time, which offers a wide range of possible applications in sensors, detectors, solar cells, etc.http://www.sciencedirect.com/science/article/pii/S2211379723000396Terahertz metamaterialVanadium dioxidePhotosensitive siliconAbsorptionPolarization conversion |
| spellingShingle | Tianli Dong Ying Zhang You Li Yupei Tang Xunjun He Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics Results in Physics Terahertz metamaterial Vanadium dioxide Photosensitive silicon Absorption Polarization conversion |
| title | Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics |
| title_full | Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics |
| title_fullStr | Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics |
| title_full_unstemmed | Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics |
| title_short | Dual-function switchable terahertz metamaterial device with dynamic tuning characteristics |
| title_sort | dual function switchable terahertz metamaterial device with dynamic tuning characteristics |
| topic | Terahertz metamaterial Vanadium dioxide Photosensitive silicon Absorption Polarization conversion |
| url | http://www.sciencedirect.com/science/article/pii/S2211379723000396 |
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