Terahertz spin-selective metasurface for multichannel switching of OAM
Thanks to switchable wavefronts, design methods of diverse functions are greatly enriched. However, less attention has been paid to multichannel switchable orbital angular momentums (OAMs) of metasurfaces in previous reports. In this work, a spin-selective metasurface enabling multichannel switchabl...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-01-01
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| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379723010720 |
| _version_ | 1797350913169424384 |
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| author | Kaiyu Guo Miao Zhang Zhiqiang Du Zhengyong Song |
| author_facet | Kaiyu Guo Miao Zhang Zhiqiang Du Zhengyong Song |
| author_sort | Kaiyu Guo |
| collection | DOAJ |
| description | Thanks to switchable wavefronts, design methods of diverse functions are greatly enriched. However, less attention has been paid to multichannel switchable orbital angular momentums (OAMs) of metasurfaces in previous reports. In this work, a spin-selective metasurface enabling multichannel switchable OAMs is proposed in terahertz band. This metasurface is designed based on the phase change property of vanadium dioxide (VO2). Firstly, when VO2 is metal, vortex beam with topological charge of l = 2 is achieved under left-handed circular polarization (LCP) incidence. Under right-handed circular polarization (RCP) incidence, the obtained vortex beam has a topological charge of l = -3. Secondly, when VO2 is changed to insulator, function of the metasurface is correspondingly switched. Under LCP and RCP incidences, vortex beams are realized with topological charges of l = 3 and l = -2. Therefore, the designed metasurface as a multichannel vortex beam generator has switchable characteristic. Our design shows great promise in the integration of multifunctional devices. |
| first_indexed | 2024-03-08T12:52:55Z |
| format | Article |
| id | doaj.art-f7d9a3e046014edf879b0c3614e6bff0 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-03-08T12:52:55Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-f7d9a3e046014edf879b0c3614e6bff02024-01-20T04:45:15ZengElsevierResults in Physics2211-37972024-01-0156107279Terahertz spin-selective metasurface for multichannel switching of OAMKaiyu Guo0Miao Zhang1Zhiqiang Du2Zhengyong Song3School of Electronic Science and Engineering, Xiamen University, Xiamen 361005, ChinaSchool of Electronic Science and Engineering, Xiamen University, Xiamen 361005, China; Shenzhen Research Institute of Xiamen University, Shenzhen 518057, ChinaSchool of Electronic Science and Engineering, Xiamen University, Xiamen 361005, ChinaSchool of Electronic Science and Engineering, Xiamen University, Xiamen 361005, China; Corresponding author.Thanks to switchable wavefronts, design methods of diverse functions are greatly enriched. However, less attention has been paid to multichannel switchable orbital angular momentums (OAMs) of metasurfaces in previous reports. In this work, a spin-selective metasurface enabling multichannel switchable OAMs is proposed in terahertz band. This metasurface is designed based on the phase change property of vanadium dioxide (VO2). Firstly, when VO2 is metal, vortex beam with topological charge of l = 2 is achieved under left-handed circular polarization (LCP) incidence. Under right-handed circular polarization (RCP) incidence, the obtained vortex beam has a topological charge of l = -3. Secondly, when VO2 is changed to insulator, function of the metasurface is correspondingly switched. Under LCP and RCP incidences, vortex beams are realized with topological charges of l = 3 and l = -2. Therefore, the designed metasurface as a multichannel vortex beam generator has switchable characteristic. Our design shows great promise in the integration of multifunctional devices.http://www.sciencedirect.com/science/article/pii/S2211379723010720MetasurfaceMultichannelOAMSpin |
| spellingShingle | Kaiyu Guo Miao Zhang Zhiqiang Du Zhengyong Song Terahertz spin-selective metasurface for multichannel switching of OAM Results in Physics Metasurface Multichannel OAM Spin |
| title | Terahertz spin-selective metasurface for multichannel switching of OAM |
| title_full | Terahertz spin-selective metasurface for multichannel switching of OAM |
| title_fullStr | Terahertz spin-selective metasurface for multichannel switching of OAM |
| title_full_unstemmed | Terahertz spin-selective metasurface for multichannel switching of OAM |
| title_short | Terahertz spin-selective metasurface for multichannel switching of OAM |
| title_sort | terahertz spin selective metasurface for multichannel switching of oam |
| topic | Metasurface Multichannel OAM Spin |
| url | http://www.sciencedirect.com/science/article/pii/S2211379723010720 |
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