Polarization insensitive achromatic terahertz metalens based on all-dielectric metasurfaces
文献类型:期刊论文
作者 | Qin, Chong2,3; Fan, Wenhui1,2,3; Wu, Qi2,3; Jiang, Xiaoqiang2,3 |
刊名 | Optics Communications |
出版日期 | 2022-06-01 |
卷号 | 512 |
ISSN号 | 00304018 |
关键词 | Polarization insensitive Achromatic metalens Terahertz wave |
DOI | 10.1016/j.optcom.2022.128061 |
产权排序 | 1 |
英文摘要 | Terahertz wave has great potential in wireless communication, biomedical monitoring and spectroscopy. However, the lack of terahertz functional devices hinders the development of terahertz technology. Metasurface is a kind of novel artificial two-dimensional electromagnetic metamaterials, which can efficiently manipulate the electromagnetic wave at sub-wavelength scale and have the advantages of small size and light weight. Therefore, metasurfaces provide an additional modality to realize terahertz functional devices. Terahertz metalens based on metasurfaces is an indispensable functional component, but there is chromatic aberration that will degrade its performance when broadband terahertz wave is incident, so it is very important to eliminate the chromatic aberration of terahertz metalens, especially for terahertz imaging, and so on. In this paper, we elaborate the principle of elimination of chromatic aberration and design a polarization insensitive achromatic metalens working in the frequency range from 0.8 THz to 1.2 THz with numerical aperture of 0.46, three types of meta-atoms with different cross-section shapes are adopted to constitute achromatic metalens. The numerical simulation has also been carried out for the proposed achromatic metalens. The maximum deviation of focal length and average focusing efficiency of the proposed achromatic metalens across the working frequency range is 4.74% and 38.47%, respectively. Meanwhile, the achromatic metalens is polarization insensitive due to the symmetric cross-section shapes of meta-atoms adopted. The polarization insensitive achromatic metalens will pave the way for the practical application of terahertz devices based on metasurfaces. © 2022 Elsevier B.V. |
语种 | 英语 |
出版者 | Elsevier B.V. |
源URL | [http://ir.opt.ac.cn/handle/181661/95743] |
专题 | 西安光学精密机械研究所_瞬态光学技术国家重点实验室 |
通讯作者 | Fan, Wenhui |
作者单位 | 1.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 2.University of Chinese Academy of Sciences, Beijing; 100049, China; 3.State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; |
推荐引用方式 GB/T 7714 | Qin, Chong,Fan, Wenhui,Wu, Qi,et al. Polarization insensitive achromatic terahertz metalens based on all-dielectric metasurfaces[J]. Optics Communications,2022,512. |
APA | Qin, Chong,Fan, Wenhui,Wu, Qi,&Jiang, Xiaoqiang.(2022).Polarization insensitive achromatic terahertz metalens based on all-dielectric metasurfaces.Optics Communications,512. |
MLA | Qin, Chong,et al."Polarization insensitive achromatic terahertz metalens based on all-dielectric metasurfaces".Optics Communications 512(2022). |
入库方式: OAI收割
来源:西安光学精密机械研究所
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