Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region
Multifunctional coding metasurfaces can provide more options for highly integrated terahertz modulators, which has become one of the current research focus. This study proposed a tunable chiral metasurface based on a Dirac semimetal (DSM). Two U-shaped rings placed perpendicular to each other in the...
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| Format: | Article |
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Elsevier
2023-03-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221137972300116X |
| _version_ | 1797870627158228992 |
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| author | Zhenkai Li Chunyang Jiang Kun Wang Meng Liu Chuanhao Li Changdong Tian Huiyun Zhang Yuping Zhang |
| author_facet | Zhenkai Li Chunyang Jiang Kun Wang Meng Liu Chuanhao Li Changdong Tian Huiyun Zhang Yuping Zhang |
| author_sort | Zhenkai Li |
| collection | DOAJ |
| description | Multifunctional coding metasurfaces can provide more options for highly integrated terahertz modulators, which has become one of the current research focus. This study proposed a tunable chiral metasurface based on a Dirac semimetal (DSM). Two U-shaped rings placed perpendicular to each other in the opening direction comprised the metasurface unit cell. Further, the multifunctional application of the metasurface in the terahertz region was realized through coding. The chiral metasurface exhibited strong chirality for incident circularly polarized light with circular dichroism (CD) of up to 0.72 at 2.31 THz. The combination of the chiral metasurface with the Pancharatnam-Berry (PB) phase aided in the realization of a wideband switchable terahertz vortex beam generator, arbitrary angular deflection tuning of the vortex beam, and multi-beam splitting operation of the vortex light using a Fourier convolution operation. In addition, switchable near-field imaging applications were developed by encoding metasurface unit cell cells according to their chirality and amplitude. The results of this study are expected to yield promising applications in future terahertz high-data-capacity communication systems, multi-target information transmission, and controlled near-field imaging. |
| first_indexed | 2024-04-10T00:30:22Z |
| format | Article |
| id | doaj.art-ec7eeb5da0324dce9c3b5453026ce87e |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-10T00:30:22Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-ec7eeb5da0324dce9c3b5453026ce87e2023-03-15T04:27:57ZengElsevierResults in Physics2211-37972023-03-0146106323Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz regionZhenkai Li0Chunyang Jiang1Kun Wang2Meng Liu3Chuanhao Li4Changdong Tian5Huiyun Zhang6Yuping Zhang7Qingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaQingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaQingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaQingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaQingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaQingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaQingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCorresponding author.; Qingdao Key Laboratory of Terahertz Technology, College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaMultifunctional coding metasurfaces can provide more options for highly integrated terahertz modulators, which has become one of the current research focus. This study proposed a tunable chiral metasurface based on a Dirac semimetal (DSM). Two U-shaped rings placed perpendicular to each other in the opening direction comprised the metasurface unit cell. Further, the multifunctional application of the metasurface in the terahertz region was realized through coding. The chiral metasurface exhibited strong chirality for incident circularly polarized light with circular dichroism (CD) of up to 0.72 at 2.31 THz. The combination of the chiral metasurface with the Pancharatnam-Berry (PB) phase aided in the realization of a wideband switchable terahertz vortex beam generator, arbitrary angular deflection tuning of the vortex beam, and multi-beam splitting operation of the vortex light using a Fourier convolution operation. In addition, switchable near-field imaging applications were developed by encoding metasurface unit cell cells according to their chirality and amplitude. The results of this study are expected to yield promising applications in future terahertz high-data-capacity communication systems, multi-target information transmission, and controlled near-field imaging.http://www.sciencedirect.com/science/article/pii/S221137972300116XTerahertzDirac semimetalsCoding metasurfaceMultifunction |
| spellingShingle | Zhenkai Li Chunyang Jiang Kun Wang Meng Liu Chuanhao Li Changdong Tian Huiyun Zhang Yuping Zhang Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region Results in Physics Terahertz Dirac semimetals Coding metasurface Multifunction |
| title | Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region |
| title_full | Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region |
| title_fullStr | Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region |
| title_full_unstemmed | Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region |
| title_short | Active manipulation of Dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region |
| title_sort | active manipulation of dirac semimetals supported chiral coding metasurfaces for multifunctional applications in terahertz region |
| topic | Terahertz Dirac semimetals Coding metasurface Multifunction |
| url | http://www.sciencedirect.com/science/article/pii/S221137972300116X |
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