Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain
In recent years, metasurface-based focusing elements have gradually become an indispensable type of terahertz lenses. However, the meta-lens often suffers from chromatic aberration due to the intrinsic dispersion of each element, especially in the broadband application scenarios. In this paper, we d...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2020-12-01
|
| Series: | Frontiers in Physics |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2020.606693/full |
| _version_ | 1818601750209232896 |
|---|---|
| author | Yufei Gao Jianqiang Gu Ridong Jia Zhen Tian Chunmei Ouyang Jiaguang Han Weili Zhang Weili Zhang |
| author_facet | Yufei Gao Jianqiang Gu Ridong Jia Zhen Tian Chunmei Ouyang Jiaguang Han Weili Zhang Weili Zhang |
| author_sort | Yufei Gao |
| collection | DOAJ |
| description | In recent years, metasurface-based focusing elements have gradually become an indispensable type of terahertz lenses. However, the meta-lens often suffers from chromatic aberration due to the intrinsic dispersion of each element, especially in the broadband application scenarios. In this paper, we design and demonstrate a silicon-based achromatic meta-lens working from 0.6 to 1.0 THz, which is polarization insensitive because of the adopted symmetrical structures. The simulated focal length and the full width at half maximum (FWHM) of the foci at different frequencies prove the achromatic behavior of our meta-lens compared with the chromatic counterpart. We also show that the focus shift incongruence of our design originates from the transmission amplitude distribution of the meta-lens. This article not only provides an achromatic planar lens working at terahertz domain but also reveals the importance of the amplitude distribution in the achromatic metasurface design. |
| first_indexed | 2024-12-16T12:56:20Z |
| format | Article |
| id | doaj.art-111f03aba93446e795bdfe014ece3f30 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-12-16T12:56:20Z |
| publishDate | 2020-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-111f03aba93446e795bdfe014ece3f302022-12-21T22:31:01ZengFrontiers Media S.A.Frontiers in Physics2296-424X2020-12-01810.3389/fphy.2020.606693606693Polarization Independent Achromatic Meta-Lens Designed for the Terahertz DomainYufei Gao0Jianqiang Gu1Ridong Jia2Zhen Tian3Chunmei Ouyang4Jiaguang Han5Weili Zhang6Weili Zhang7Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin, ChinaCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin, ChinaCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin, ChinaCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin, ChinaCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin, ChinaCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin, ChinaCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and the Key Laboratory of Optoelectronics Information and Technology, Ministry of Education of China, Tianjin, ChinaSchool of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK, United StatesIn recent years, metasurface-based focusing elements have gradually become an indispensable type of terahertz lenses. However, the meta-lens often suffers from chromatic aberration due to the intrinsic dispersion of each element, especially in the broadband application scenarios. In this paper, we design and demonstrate a silicon-based achromatic meta-lens working from 0.6 to 1.0 THz, which is polarization insensitive because of the adopted symmetrical structures. The simulated focal length and the full width at half maximum (FWHM) of the foci at different frequencies prove the achromatic behavior of our meta-lens compared with the chromatic counterpart. We also show that the focus shift incongruence of our design originates from the transmission amplitude distribution of the meta-lens. This article not only provides an achromatic planar lens working at terahertz domain but also reveals the importance of the amplitude distribution in the achromatic metasurface design.https://www.frontiersin.org/articles/10.3389/fphy.2020.606693/fullachromaticmeta-lenspolarization independentterahertzmetasurfaces |
| spellingShingle | Yufei Gao Jianqiang Gu Ridong Jia Zhen Tian Chunmei Ouyang Jiaguang Han Weili Zhang Weili Zhang Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain Frontiers in Physics achromatic meta-lens polarization independent terahertz metasurfaces |
| title | Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain |
| title_full | Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain |
| title_fullStr | Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain |
| title_full_unstemmed | Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain |
| title_short | Polarization Independent Achromatic Meta-Lens Designed for the Terahertz Domain |
| title_sort | polarization independent achromatic meta lens designed for the terahertz domain |
| topic | achromatic meta-lens polarization independent terahertz metasurfaces |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2020.606693/full |
| work_keys_str_mv | AT yufeigao polarizationindependentachromaticmetalensdesignedfortheterahertzdomain AT jianqianggu polarizationindependentachromaticmetalensdesignedfortheterahertzdomain AT ridongjia polarizationindependentachromaticmetalensdesignedfortheterahertzdomain AT zhentian polarizationindependentachromaticmetalensdesignedfortheterahertzdomain AT chunmeiouyang polarizationindependentachromaticmetalensdesignedfortheterahertzdomain AT jiaguanghan polarizationindependentachromaticmetalensdesignedfortheterahertzdomain AT weilizhang polarizationindependentachromaticmetalensdesignedfortheterahertzdomain AT weilizhang polarizationindependentachromaticmetalensdesignedfortheterahertzdomain |