Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation
Dielectric chiral metasurface is a new type of planar and efficient chiral optical device that shows strong circular dichroism or optical activity, which has important application potential in optical sensing and display. However, the two types of chiral optical responses in conventional chiral meta...
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| Format: | Article |
| Language: | English |
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Institue of Optics and Electronics, Chinese Academy of Sciences
2024-10-01
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| Series: | Opto-Electronic Advances |
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| Online Access: | https://www.oejournal.org/article/doi/10.29026/oea.2024.240075 |
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| _version_ | 1846116333069008896 |
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| author | Jie Li Xueguang Lu Hui Li Chunyu Song Qi Tan Yu He Jingyu Liu Li Luo Tingting Tang Tingting Liu Hang Xu Shuyuan Xiao Wanxia Huang Yun Shen Yan Zhang Yating Zhang Jianquan Yao |
| author_facet | Jie Li Xueguang Lu Hui Li Chunyu Song Qi Tan Yu He Jingyu Liu Li Luo Tingting Tang Tingting Liu Hang Xu Shuyuan Xiao Wanxia Huang Yun Shen Yan Zhang Yating Zhang Jianquan Yao |
| author_sort | Jie Li |
| collection | DOAJ |
| description | Dielectric chiral metasurface is a new type of planar and efficient chiral optical device that shows strong circular dichroism or optical activity, which has important application potential in optical sensing and display. However, the two types of chiral optical responses in conventional chiral metasurfaces are often interdependent, as their modulation of the amplitudes and phases of orthogonal circularly polarized components is correlated, which limits the further progress of chiral meta-devices. Here we propose a new scheme for independently designing the circular dichroism and optical activity of chiral metasurfaces to further control the polarization and wavefront of transmitted waves. Inspired by mixtures of chiral molecular isomers, we use the dielectric isomer resonators to form “super-units” instead of single meta-atoms for chiral responses in terahertz band, which is called racemic metasurface. By introducing two levels of Pancharatnam-Berry phases between meta-atoms and “super-units”, the polarization rotation angle and wavefront of the beam can be designed without the far-field circular dichroism. We demonstrate the strong control ability on terahertz waves of this scheme through simulation and experiments. In addition, this new type of device with near-field chirality but no far-field circular dichroism may also have important value in optical sensing and other technologies. |
| format | Article |
| id | doaj-art-8b39ed7903aa475ca242026bcb25c620 |
| institution | Kabale University |
| issn | 2096-4579 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Institue of Optics and Electronics, Chinese Academy of Sciences |
| record_format | Article |
| series | Opto-Electronic Advances |
| spelling | doaj-art-8b39ed7903aa475ca242026bcb25c6202024-12-19T06:29:47ZengInstitue of Optics and Electronics, Chinese Academy of SciencesOpto-Electronic Advances2096-45792024-10-0171011010.29026/oea.2024.240075OEA-2024-0075LijieRacemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulationJie Li0Xueguang Lu1Hui Li2Chunyu Song3Qi Tan4Yu He5Jingyu Liu6Li Luo7Tingting Tang8Tingting Liu9Hang Xu10Shuyuan Xiao11Wanxia Huang12Yun Shen13Yan Zhang14Yating Zhang15Jianquan Yao16College of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, ChinaCollege of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaCollege of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, ChinaKey Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048, ChinaCollege of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, ChinaCollege of Optoelectronic Engineering, Chengdu University of Information Technology, Chengdu 610225, ChinaSchool of Information Engineering, Nanchang University, Nanchang 330031, ChinaSchool of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Information Engineering, Nanchang University, Nanchang 330031, ChinaCollege of Materials Science and Engineering, Sichuan University, Chengdu 610065, ChinaDepartment of Physics, School of Physics and Materials Science, Nanchang University, Nanchang 330031, ChinaKey Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048, ChinaSchool of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, ChinaDielectric chiral metasurface is a new type of planar and efficient chiral optical device that shows strong circular dichroism or optical activity, which has important application potential in optical sensing and display. However, the two types of chiral optical responses in conventional chiral metasurfaces are often interdependent, as their modulation of the amplitudes and phases of orthogonal circularly polarized components is correlated, which limits the further progress of chiral meta-devices. Here we propose a new scheme for independently designing the circular dichroism and optical activity of chiral metasurfaces to further control the polarization and wavefront of transmitted waves. Inspired by mixtures of chiral molecular isomers, we use the dielectric isomer resonators to form “super-units” instead of single meta-atoms for chiral responses in terahertz band, which is called racemic metasurface. By introducing two levels of Pancharatnam-Berry phases between meta-atoms and “super-units”, the polarization rotation angle and wavefront of the beam can be designed without the far-field circular dichroism. We demonstrate the strong control ability on terahertz waves of this scheme through simulation and experiments. In addition, this new type of device with near-field chirality but no far-field circular dichroism may also have important value in optical sensing and other technologies.https://www.oejournal.org/article/doi/10.29026/oea.2024.240075racemicdielectric metasurfacesterahertz waveschirality |
| spellingShingle | Jie Li Xueguang Lu Hui Li Chunyu Song Qi Tan Yu He Jingyu Liu Li Luo Tingting Tang Tingting Liu Hang Xu Shuyuan Xiao Wanxia Huang Yun Shen Yan Zhang Yating Zhang Jianquan Yao Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation Opto-Electronic Advances racemic dielectric metasurfaces terahertz waves chirality |
| title | Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation |
| title_full | Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation |
| title_fullStr | Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation |
| title_full_unstemmed | Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation |
| title_short | Racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation |
| title_sort | racemic dielectric metasurfaces for arbitrary terahertz polarization rotation and wavefront manipulation |
| topic | racemic dielectric metasurfaces terahertz waves chirality |
| url | https://www.oejournal.org/article/doi/10.29026/oea.2024.240075 |
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