A Bilayer Plasmonic Metasurface for Polarization‐Insensitive Bidirectional Perfect Absorption,Advanced Theory and Simulations

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A Bilayer Plasmonic Metasurface for Polarization‐Insensitive Bidirectional Perfect Absorption
Advanced Theory and Simulations ( IF 2.9 ) Pub Date : 2020-01-13 , DOI: 10.1002/adts.201900216
Zhancheng Li ₁ , Wenwei Liu ₁ , Chengchun Tang ₂ , Hua Cheng ₁ , Zhi Li ₁ , Yuebian Zhang ₁ , Junjie Li ₃ , Shuqi Chen _{1,

4,

5,

6} , Jianguo Tian ₁

Affiliation

The implementation of perfect absorption of optical waves in artificial nanostructures has attracted tremendous attention among the scientific community. Traditional approaches based on metamaterials can only absorb optical waves in one direction while reflecting optical waves in the other direction. Here, a polarization‐insensitive bidirectional perfect absorber that is composed of bilayer gold nano disks embedded into a silicon nitride substrate is demonstrated. The bidirectional perfect absorption in the proposed bilayer metasurface, which is irrelevant to the coherent of optical waves, is attributed to the multiple reflections and interference of optical waves in the bilayer structures. The proposed perfect absorber shall boost its applications in optical anti‐counterfeiting, integrated photodetectors, and solar thermal applications.

中文翻译：

极化不敏感双向完美吸收的双层等离子超表面

在人造纳米结构中实现光波的完美吸收已经引起了科学界的极大关注。基于超材料的传统方法只能在一个方向上吸收光波，而在另一方向上反射光波。在此，展示了一种偏振不敏感的双向完美吸收体，该吸收体由嵌入氮化硅衬底中的双层金纳米盘组成。所提出的双层超表面中的双向完美吸收与光波的相干性无关，归因于双层结构中光波的多次反射和干涉。拟议的完美吸收体将促进其在光学防伪，集成光电探测器和太阳热应用中的应用。

更新日期：2020-03-04

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