Highly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz band
Polarization is a basic characteristic of electromagnetic waves that conveys much optical information owing to its many states. The polarization state is manipulated and controlled for optical information security, optical encryption, and optical communication. Metasurface devices provide a new way...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Institue of Optics and Electronics, Chinese Academy of Sciences
2023-02-01
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| Series: | Opto-Electronic Advances |
| Subjects: | |
| Online Access: | https://www.oejournal.org/article/doi/10.29026/oea.2023.220012 |
| _version_ | 1797851248527933440 |
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| author | Huan Zhao Xinke Wang Shutian Liu Yan Zhang |
| author_facet | Huan Zhao Xinke Wang Shutian Liu Yan Zhang |
| author_sort | Huan Zhao |
| collection | DOAJ |
| description | Polarization is a basic characteristic of electromagnetic waves that conveys much optical information owing to its many states. The polarization state is manipulated and controlled for optical information security, optical encryption, and optical communication. Metasurface devices provide a new way to manipulate wave-fronts of light. A single ultrathin metasurface device can generate and modulate several differently polarized light fields, and thus carries optical information in several different channels. Terahertz (THz) waves have become widely used as carrier waves for wireless communication. Compact and functional metasurface devices are in high demand for THz elements and systems. This paper proposes a tri-layer metallic THz metasurface for multi-channel polarization generation and phase modulation with a high efficiency of approximately 80%. An azimuthally polarized THz vectorial beam generator is realized and characterized for use as a THz polarization analyzer. The incident polarization angle can be observed graphically with high accuracy. Moreover, a vectorial hologram with eight channels for different linear polarization states is demonstrated experimentally. The information in different holograms can be hidden by choosing the polarization channel for detection. This work contributes to achieving multi-functional metasurface in the THz band and can benefit THz communication and optical information security. |
| first_indexed | 2024-04-09T19:14:50Z |
| format | Article |
| id | doaj.art-95740722e1e3474b9f101a7ecfd86b15 |
| institution | Directory Open Access Journal |
| issn | 2096-4579 |
| language | English |
| last_indexed | 2024-04-09T19:14:50Z |
| publishDate | 2023-02-01 |
| publisher | Institue of Optics and Electronics, Chinese Academy of Sciences |
| record_format | Article |
| series | Opto-Electronic Advances |
| spelling | doaj.art-95740722e1e3474b9f101a7ecfd86b152023-04-06T07:19:58ZengInstitue of Optics and Electronics, Chinese Academy of SciencesOpto-Electronic Advances2096-45792023-02-016211110.29026/oea.2023.220012oea-2022-0012-ZhangyanHighly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz bandHuan Zhao0Xinke Wang1Shutian Liu2Yan Zhang3Department of Physics, Harbin Institute of Technology, Harbin 150001, ChinaBeijing Key Laboratory of Metamaterials and Devices, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing Advanced Innovation Center for Imaging Theory and Technology, Department of Physics, Capital Normal University, Beijing 100048, ChinaDepartment of Physics, Harbin Institute of Technology, Harbin 150001, ChinaBeijing Key Laboratory of Metamaterials and Devices, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing Advanced Innovation Center for Imaging Theory and Technology, Department of Physics, Capital Normal University, Beijing 100048, ChinaPolarization is a basic characteristic of electromagnetic waves that conveys much optical information owing to its many states. The polarization state is manipulated and controlled for optical information security, optical encryption, and optical communication. Metasurface devices provide a new way to manipulate wave-fronts of light. A single ultrathin metasurface device can generate and modulate several differently polarized light fields, and thus carries optical information in several different channels. Terahertz (THz) waves have become widely used as carrier waves for wireless communication. Compact and functional metasurface devices are in high demand for THz elements and systems. This paper proposes a tri-layer metallic THz metasurface for multi-channel polarization generation and phase modulation with a high efficiency of approximately 80%. An azimuthally polarized THz vectorial beam generator is realized and characterized for use as a THz polarization analyzer. The incident polarization angle can be observed graphically with high accuracy. Moreover, a vectorial hologram with eight channels for different linear polarization states is demonstrated experimentally. The information in different holograms can be hidden by choosing the polarization channel for detection. This work contributes to achieving multi-functional metasurface in the THz band and can benefit THz communication and optical information security.https://www.oejournal.org/article/doi/10.29026/oea.2023.220012terahertz devicepolarization statehologramhigh-efficiency device |
| spellingShingle | Huan Zhao Xinke Wang Shutian Liu Yan Zhang Highly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz band Opto-Electronic Advances terahertz device polarization state hologram high-efficiency device |
| title | Highly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz band |
| title_full | Highly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz band |
| title_fullStr | Highly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz band |
| title_full_unstemmed | Highly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz band |
| title_short | Highly efficient vectorial field manipulation using a transmitted tri-layer metasurface in the terahertz band |
| title_sort | highly efficient vectorial field manipulation using a transmitted tri layer metasurface in the terahertz band |
| topic | terahertz device polarization state hologram high-efficiency device |
| url | https://www.oejournal.org/article/doi/10.29026/oea.2023.220012 |
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