Full-Stokes Polarization Perfect Absorption with Diatomic Metasurfaces,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Full-Stokes Polarization Perfect Absorption with Diatomic Metasurfaces
Nano Letters ( IF 9.6 ) Pub Date : 2021-01-13 , DOI: 10.1021/acs.nanolett.0c04456
Yao Liang ₁ , Han Lin ₁ , Kirill Koshelev _{2,

3} , Fengchun Zhang ₄ , Yunyi Yang ₁ , Jiayang Wu ₅ , Yuri Kivshar _{2,

3} , Baohua Jia ₁

Affiliation

Metamaterial-based perfect absorbers provide efficient ways for selective absorption of light with both linear or circular polarizations. Perfect absorption for an arbitrary polarization requires the development of subwavelength structures absorbing efficiently elliptically polarized light, but they remain largely unexplored. Here, we design and realize experimentally novel plasmonic metasurfaces for full-Stokes polarization perfect absorption in the mid-infrared. The metasurface unit cell consists of coupled anisotropic meta-atoms forming a diatomic metamolecule. The designed plasmonic metastructures provide a strong field enhancement by at least 1 order of magnitude higher than conventional perfect absorbers. In experiment, our plasmonic metasurfaces demonstrate sharp differentiation of spectral responses for an arbitrary pair of orthogonal polarization states (linear, circular, or elliptical) providing perfect absorption for one polarization with strong reflection for its counterpart. Our results suggest a novel route for efficient control of light polarization in metasurfaces offering numerous potential applications ranging from thermal imaging to chiral molecule detection.

中文翻译：

全斯托克斯极化与双原子超表面的完美吸收

基于超材料的完美吸收体为选择性吸收线性或圆偏振光提供了有效的方法。对任意偏振的完美吸收要求开发能有效吸收椭圆偏振光的亚波长结构，但仍未充分开发。在这里，我们设计并实现了实验性的新型等离子超表面，以实现中红外全斯托克斯偏振完美吸收。超表面单位晶胞由形成双原子超分子的耦合的各向异性超原子组成。所设计的等离子体元结构提供了比传统的理想吸收器高至少1个数量级的强场增强。在实验中我们的等离质子超表面对任意一对正交偏振态（线性，圆形或椭圆形）的光谱响应都表现出明显的区分，从而为一个偏振态提供了完美的吸收，并为其对应物提供了强反射。我们的研究结果提出了一种有效控制超颖表面光偏振的新途径，提供了从热成像到手性分子检测的众多潜在应用。

更新日期：2021-01-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11